Mathematical Methods in the Physical Sciences
3rd Edition
ISBN: 9780471198260
Author: Mary L. Boas
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 8.6, Problem 32P
Using Problems 29 and 31b, show that equation (6.24) is correct.
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Module Code: MATH380202
3. (a) Let {} be a white noise process with variance σ2.
Define an ARMA(p,q) process {X} in terms of {+} and state (without proof)
conditions for {X} to be (i) weakly stationary and (ii) invertible.
Define what is meant by an ARIMA (p, d, q) process. Let {Y} be such an ARIMA(p, d, q)
process and show how it can also be represented as an ARMA process, giving the
AR and MA orders of this representation.
(b) The following tables show the first nine sample autocorrelations and partial auto-
correlations of X and Y₁ = VX+ for a series of n = 1095 observations. (Notice
that the notation in this part has no relationship with the notation in part (a) of
this question.)
Identify a model for this time series and obtain preliminary estimates for the pa-
rameters of your model.
X₁
= 15.51, s² = 317.43.
k
1
2
3
4
5
6
7
Pk
0.981
0.974
0.968
akk 0.981 0.327
8
9
0.927
0.963 0.957 0.951 0.943 0.935
0.121 0.104 0.000 0.014 -0.067 -0.068 -0.012
Y₁ = VX : y = 0.03, s² = 11.48.
k
1…
Chapter 8 Solutions
Mathematical Methods in the Physical Sciences
Ch. 8.1 - Verify the statement of Example 2. Also verify...Ch. 8.1 - Solve Example 4 using the general solution...Ch. 8.1 - Verify that y=sinx,y=cosx,y=eix, and y=eix are all...Ch. 8.1 - Find the distance which an object moves in time t...Ch. 8.1 - Find the position x of a particle at time t if its...Ch. 8.1 - A substance evaporates at a rate proportional to...Ch. 8.1 - The momentum p of an electron at speed v near the...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...
Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - For each of the following differential equations,...Ch. 8.2 - In Problems 13 to 15, find a solution (or...Ch. 8.2 - In Problems 13 to 15, find a solution (or...Ch. 8.2 - In Problems 13 to 15, find a solution (or...Ch. 8.2 - By separation of variables, find a solution of the...Ch. 8.2 - The speed of a particle on the x axis, x0, is...Ch. 8.2 - Let the rate of growth dN/dt of a colony of...Ch. 8.2 - (a) Consider a light beam traveling downward into...Ch. 8.2 - Consider the following special cases of the simple...Ch. 8.2 - Suppose the rate at which bacteria in a culture...Ch. 8.2 - Solve the equation for the rate of growth of...Ch. 8.2 - Heat is escaping at a constant rate [dQ/dtin(1.1)...Ch. 8.2 - Do Problem 23 for a spherical cavity containing a...Ch. 8.2 - Show that the thickness of the ice on a lake...Ch. 8.2 - An object of mass m falls from rest under gravity...Ch. 8.2 - According to Newtons law of cooling, the rate at...Ch. 8.2 - A glass of milk at 38 is removed from the...Ch. 8.2 - A solution containing 90 by volume of alcohol (in...Ch. 8.2 - If P dollars are left in the bank at interest I...Ch. 8.2 - Find the orthogonal trajectories of each of the...Ch. 8.2 - Find the orthogonal trajectories of each of the...Ch. 8.2 - Find the orthogonal trajectories of each of the...Ch. 8.2 - Find the orthogonal trajectories of each of the...Ch. 8.2 - Find the orthogonal trajectories of each of the...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Using (3.9), find the general solution of each of...Ch. 8.3 - Water with a small salt content (5 lb in 1000 gal)...Ch. 8.3 - Find the general solution of (1.2) for an RL...Ch. 8.3 - Find the general solution of (1.3) for an RC...Ch. 8.3 - Prob. 18PCh. 8.3 - If 1=2= in (3.10), then e21tdt=dt. Find N2 for...Ch. 8.3 - Extend the radioactive decay problem (Example 2)...Ch. 8.3 - Generalize Problem 20 to any number of stages.Ch. 8.3 - Find the orthogonal trajectories of the family of...Ch. 8.3 - Find the orthogonal trajectories of the family of...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Use the methods of this section to solve the...Ch. 8.4 - Solve the differential equation yy2+2xyy=0 by...Ch. 8.4 - If an incompressible fluid flows in a corner...Ch. 8.4 - Find the family of orthogonal trajectories of the...Ch. 8.4 - Find the family of curves satisfying the...Ch. 8.4 - Find the shape of a mirror which has the property...Ch. 8.4 - As in text just before (4.11), show that (a)...Ch. 8.4 - Show that the change of variables (4.13) in (4.11)...Ch. 8.4 - Show that (xP+yQ)1 is an integrating factor for...Ch. 8.4 - Solve Problems 9 and 10 by using an integrating...Ch. 8.4 - An equation of the form y=f(x)y2+g(x)y+h(x) is...Ch. 8.4 - Show that the substitution given in Problem 25...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Solve the following differential equations by the...Ch. 8.5 - Recall from Chapter 3, equation ( 8.5), that a set...Ch. 8.5 - Recall from Chapter 3, equation ( 8.5), that a set...Ch. 8.5 - Recall from Chapter 3, equation ( 8.5), that a set...Ch. 8.5 - Recall from Chapter 3, equation (8.5), that a set...Ch. 8.5 - Recall from Chapter 3, equation ( 8.5), that a set...Ch. 8.5 - Recall from Chapter 3, equation (8.5), that a set...Ch. 8.5 - Solve the algebraic equation D2+(1+2i)D+i1=0 (note...Ch. 8.5 - As in Problem 19, solve y+(1i)yiy=0. Hint: See...Ch. 8.5 - By the method used in solving (5.4) to get (5.9),...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Use the results of Problem 21 to find the general...Ch. 8.5 - Let D stand for d/dx, that is, Dy=dy/dx; then...Ch. 8.5 - In Example 3, we used the second solution in...Ch. 8.5 - A particle moves along the x axis subject to a...Ch. 8.5 - Find the equation of motion of a simple pendulum...Ch. 8.5 - The gravitational force on a particle of mass m...Ch. 8.5 - Find (in terms of L and C) the frequency of...Ch. 8.5 - A block of wood is floating in water; it is...Ch. 8.5 - Solve the RLC circuit equation [(5.33)or(5.34)]...Ch. 8.5 - (a) Find numerical values of the constants and...Ch. 8.5 - The natural period of an undamped system is 3 sec,...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Find the general solution of the following...Ch. 8.6 - Verify that (6.4) is a particular solution of...Ch. 8.6 - Solve (6.16) by the method used in solving (...Ch. 8.6 - Consider the differential equation...Ch. 8.6 - (a) Show that (Da)ecx=(ca)ecx;...Ch. 8.6 - (a) Show that Deaxy=eax(D+a)y, D2eaxy=eax(D+a)2y,...Ch. 8.6 - Using Problems 29 and 31b, show that equation...Ch. 8.6 - In Problem 33 to 38, solve the given differential...Ch. 8.6 - In Problem 33 to 38, solve the given differential...Ch. 8.6 - In Problem 33 to 38, solve the given differential...Ch. 8.6 - In Problem 33 to 38, solve the given differential...Ch. 8.6 - In Problem 33 to 38, solve the given differential...Ch. 8.6 - In Problem 33 to 38, solve the given differential...Ch. 8.6 - Find the solutions of (1.2) (put I=dq/dt ) and...Ch. 8.6 - In (6.38), show that for a given forcing frequency...Ch. 8.6 - Solve Problems 41 and 42 by use of Fourier series....Ch. 8.6 - Solve Problems 41 and 42 by use of Fourier series....Ch. 8.6 - Consider an equation for damped forced vibrations...Ch. 8.7 - Solve the following differential equations by...Ch. 8.7 - Solve the following differential equations by...Ch. 8.7 - Solve the following differential equations by...Ch. 8.7 - Solve the following differential equations by...Ch. 8.7 - The differential equation of a hanging chain...Ch. 8.7 - The curvature of a curve in the (x,y) plane is...Ch. 8.7 - Solve y+2y=0 by method (c) above and compare with...Ch. 8.7 - The force of gravitational attraction on a mass m...Ch. 8.7 - Show that (7.15) is a separable equation. [You may...Ch. 8.7 - In Problems 10 and 11, solve (7.14) to find v(x)...Ch. 8.7 - In Problems 10 and 11, solve (7.14) to find v(x)...Ch. 8.7 - In Problem 11, find v(x) if v=0,x=1, at t=0. Then...Ch. 8.7 - The exact equation of motion of a simple pendulum...Ch. 8.7 - Verify (7.19) and (7.20). Hint:...Ch. 8.7 - If you solve (7.17) when f(x)=0 by assuming a...Ch. 8.7 - Solve the following equations either by method (d)...Ch. 8.7 - Solve the following equations using method (d)...Ch. 8.7 - Solve the following equations using method (d)...Ch. 8.7 - Solve the following equations using method (d)...Ch. 8.7 - Solve the following equations using method (d)...Ch. 8.7 - Solve the following equations using method (d)...Ch. 8.7 - Solve the following equations using method (d)...Ch. 8.7 - Solve the two differential equations in Problem...Ch. 8.7 - Substitute (7.22) into (7.21) to obtain the...Ch. 8.7 - For the following problems, verify the given...Ch. 8.7 - For the following problems, verify the given...Ch. 8.7 - For the following problems, verify the given...Ch. 8.7 - For the following problems, verify the given...Ch. 8.7 - For the following problems, verify the given...Ch. 8.7 - For the following problems, verify the given...Ch. 8.8 - For integral k, verify L5 and L6 in the Laplace...Ch. 8.8 - By using L2, verify L7 and L8 in the Laplace...Ch. 8.8 - Using either L2, or L3 and L4, verify L9 and L10.Ch. 8.8 - By differentiating the appropriate formula with...Ch. 8.8 - By integrating the appropriate formula with...Ch. 8.8 - By replacing a in L2 by a+ib and then by aib, and...Ch. 8.8 - Verify L15 to L18, by combining appropriate...Ch. 8.8 - Find the inverse transforms of the functions F(p)...Ch. 8.8 - Find the inverse transforms of the functions F(p)...Ch. 8.8 - Find the inverse transforms of the functions F(p)...Ch. 8.8 - Find the inverse transforms of the functions F(p)...Ch. 8.8 - Find the inverse transforms of the functions F(p)...Ch. 8.8 - Find the inverse transforms of the functions F(p)...Ch. 8.8 - Show that a combination of entries L3 to L10, L13,...Ch. 8.8 - Prove L32 for n=1. Hint: Differentiate equation...Ch. 8.8 - Use L32 and L3 to obtain L11.Ch. 8.8 - Use L32 and L11 to obtain Lt2sinat.Ch. 8.8 - Use L31 to derive L21Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.8 - Table entries L28 and L29 are known as translation...Ch. 8.9 - Continuing the method used in deriving (9.1) and...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - By using Laplace transforms, solve the following...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Solve the following sets of equations by the...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.9 - Evaluate each of the following definite integrals...Ch. 8.10 - Show that g*h=h*g as claimed in I34. Hint: Let u=t...Ch. 8.10 - Use L34 and L2 to find the inverse transform of...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the convolution integral to find the inverse...Ch. 8.10 - Use the Laplace transform table to find...Ch. 8.10 - Use the convolution integral (see Example 2) to...Ch. 8.10 - Use the convolution integral (see Example 2) to...Ch. 8.10 - Consider solving an equation like (10.1) but with...Ch. 8.10 - Solve the differential equation ya2y=f(t), where...Ch. 8.10 - A mechanical or electrical system is described by...Ch. 8.10 - Following the method of equations (10.8) to...Ch. 8.11 - Find the inverse Laplace transform of e2p/p2 in...Ch. 8.11 - Verify L24 in the table by using L1, L27, and the...Ch. 8.11 - Verify L28 in the table by using L27 and the...Ch. 8.11 - Show that fn(t)dt=1 for the functions fn(t) in...Ch. 8.11 - Solve the differential equation y+2y=f(t),y0=y0=0,...Ch. 8.11 - (a) Let a mechanical or electrical system be...Ch. 8.11 - Using the function method, find the response (see...Ch. 8.11 - Using the function method, find the response (see...Ch. 8.11 - Using the function method, find the response (see...Ch. 8.11 - Using the function method, find the response (see...Ch. 8.11 - Using the function method, find the response (see...Ch. 8.11 - Evaluate the functions fn(xa) defined by the...Ch. 8.11 - Using functions, write the following mass or...Ch. 8.11 - Integrate by parts as we did for (11.14) to obtain...Ch. 8.11 - Use (11.6) and (11.14) to (11.16) to evaluate the...Ch. 8.11 - Verify the operator equation ddxsgnx=2(x) where...Ch. 8.11 - Verify (11.18a) and (11.18c) by multiplying by a...Ch. 8.11 - Use equation (11.16) to generalize the operator...Ch. 8.11 - (a) Show that you can differentiate a generalized...Ch. 8.11 - Verify the operator equations in (11.19) not done...Ch. 8.11 - Make use of the operator equations (11.19) and...Ch. 8.11 - You may find the spherical coordinate function...Ch. 8.11 - Write a formula in rectangular coordinates, in...Ch. 8.11 - Prob. 24PCh. 8.11 - Let F(x)=x2,x0,0,x0. Show that F(x)=0 for all x0,...Ch. 8.12 - Solve (12.3) if G=0 and dG/dt=0 at t=0 to obtain...Ch. 8.12 - In Problems 2 and 3, use (12.6) to solve (12.1)...Ch. 8.12 - In Problems 2 and 3, use (12.6) to solve (12.1)...Ch. 8.12 - Use equation (12.6) to solve Problem 10.18.Ch. 8.12 - Obtain ( 12.6 ) by using the convolution integral...Ch. 8.12 - For Problem 10.17, show (as in Problem 1) that the...Ch. 8.12 - Use the Green function of Problem 6 to solve...Ch. 8.12 - Solve the differential equation...Ch. 8.12 - Following the proof of (12.4), show that (12.9)...Ch. 8.12 - Solve (12.12) and (12.14) to get (12.15). Hint:...Ch. 8.12 - In Problems 11 to 13, use (12.17) to find the...Ch. 8.12 - In Problems 11 to 13, use (12.17) to find the...Ch. 8.12 - In Problems 11 to 13, use (12.17) to find the...Ch. 8.12 - (a) Given that y1(x) and y2(x) are solutions of...Ch. 8.12 - In Problems 15 to 18, use the given solutions of...Ch. 8.12 - In Problems 15 to 18, use the given solutions of...Ch. 8.12 - In Problems 15 to 18, use the given solutions of...Ch. 8.12 - In Problems 15 to 18, use the given solutions of...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - Identify each of the differential equations in...Ch. 8.13 - In Problems 25 to 28, find a particular solution...Ch. 8.13 - In Problems 25 to 28, find a particular solution...Ch. 8.13 - In Problems 25 to 28, find a particular solution...Ch. 8.13 - In Problems 25 to 28, find a particular solution...Ch. 8.13 - If 10kg of rock salt is placed in water, it...Ch. 8.13 - A mass m falls under gravity (force mg ) through a...Ch. 8.13 - The acceleration of an electron in the electric...Ch. 8.13 - Suppose that the rate at which you work on a hot...Ch. 8.13 - Compare the temperatures of your cup of coffee at...Ch. 8.13 - A flexible chain of length l is hung over a peg...Ch. 8.13 - A raindrop falls through a cloud, increasing in...Ch. 8.13 - (a) A rocket of (variable) mass m is propelled by...Ch. 8.13 - The differential equation for the path of a planet...Ch. 8.13 - Use L15 and L31 to find the Laplace transform of...Ch. 8.13 - Use L32 and L9 to find the Laplace transform of t...Ch. 8.13 - Use the Laplace transform table to evaluate:...Ch. 8.13 - Use the Laplace transform table to evaluate:...Ch. 8.13 - Find the inverse Laplace transform of: p(p+a)3Ch. 8.13 - Find the inverse Laplace transform of: p2p2+a22Ch. 8.13 - Find the inverse Laplace transform of: 1p2+a23Ch. 8.13 - Prove the following shifting or translation...Ch. 8.13 - Use the table of Laplace transforms to find the...Ch. 8.13 - Solve Problems 47 and 48 either by Laplace...Ch. 8.13 - Solve Problems 47 and 48 either by Laplace...
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- Let G be a graph with n ≥ 2 vertices x1, x2, . . . , xn, and let A be the adjacency matrixof G. Prove that if G is connected, then every entry in the matrix A^n−1 + A^nis positive.arrow_forwardModule Code: MATH380202 1. (a) Define the terms "strongly stationary" and "weakly stationary". Let {X} be a stochastic process defined for all t € Z. Assuming that {X+} is weakly stationary, define the autocorrelation function (acf) Pk, for lag k. What conditions must a process {X+) satisfy for it to be white noise? (b) Let N(0, 1) for t€ Z, with the {+} being mutually independent. Which of the following processes {X+} are weakly stationary for t> 0? Briefly justify your answers. i. Xt for all > 0. ii. Xo~N(0,) and X₁ = 2X+-1+ &t for t > 0. (c) Provide an expression for estimating the autocovariance function for a sample X1,..., X believed to be from a weakly stationary process. How is the autocor- relation function Pk then estimated, and a correlogram (or acf plot) constructed? (d) Consider the weakly stationary stochastic process ✗+ = + + +-1+ +-2 where {E} is a white noise process with variance 1. Compute the population autocorre- lation function Pk for all k = 0, 1, ....arrow_forwardiii) i=5 x² = Σ i=1 (Yi — mi)² σ 2 By minimising oc², derive the formulae for the best values of the model for a 1 degree polynomial (2 parameters).arrow_forward
- из Review the deck below and determine its total square footage (add its deck and backsplash square footage together to get the result). Type your answer in the entry box and click Submit. 126 1/2" 5" backsplash A 158" CL 79" B 26" Type your answer here.arrow_forwardRefer to page 311 for a sequence of functions defined on a given interval. Instructions: • Analyze whether the sequence converges pointwise and/or uniformly on the given interval. • Discuss the implications of uniform convergence for integration and differentiation of the sequence. • Provide counterexamples if any condition fails. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qo Hazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 310 for a matrix and its associated system of differential equations. Instructions: • Find the eigenvalues of the given matrix and classify the stability of the system (e.g., stable, • unstable, saddle point). Discuss the geometric interpretation of eigenvalues in the context of system behavior. • Provide conditions under which the system exhibits periodic solutions. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qoHazb9tC440 AZF/view?usp=sharing]arrow_forward
- Refer to page 313 for a nonlinear differential equation and its linear approximation. Instructions: • Linearize the given nonlinear system around the equilibrium points. • Analyze the stability of each equilibrium using the Jacobian matrix and its eigenvalues. • Discuss the limitations of linearization for determining global behavior. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qoHazb9tC440 AZF/view?usp=sharing]arrow_forwardRefer to page 314 for a matrix and its decomposed form. Instructions: • Verify the given singular value decomposition of the matrix. • • Discuss the geometric interpretation of the left and right singular vectors. Use the SVD to analyze the matrix's rank and nullity. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qoHazb9tC440 AZ F/view?usp=sharing]arrow_forwardRefer to page 312 for a set of mappings between two groups G and H. Instructions: • • Verify which of the provided mappings are homomorphisms. Determine the kernel and image of valid homomorphisms and discuss their properties. • State whether the groups are isomorphic, justifying your conclusion. Link: [https://drive.google.com/file/d/1wKSrun-GlxirS3IZ9qo Hazb9tC440 AZF/view?usp=sharing]arrow_forward
- 12:25 AM Sun Dec 22 uestion 6- Week 8: QuX Assume that a company X + → C ezto.mheducation.com Week 8: Quiz i Saved 6 4 points Help Save & Exit Submit Assume that a company is considering purchasing a machine for $50,000 that will have a five-year useful life and a $5,000 salvage value. The machine will lower operating costs by $17,000 per year. The company's required rate of return is 15%. The net present value of this investment is closest to: Click here to view Exhibit 12B-1 and Exhibit 12B-2, to determine the appropriate discount factor(s) using the tables provided. 00:33:45 Multiple Choice О $6,984. $11,859. $22,919. ○ $9,469, Mc Graw Hill 2 100-arrow_forwardNo chatgpt pls will upvotearrow_forward7. [10 marks] Let G = (V,E) be a 3-connected graph. We prove that for every x, y, z Є V, there is a cycle in G on which x, y, and z all lie. (a) First prove that there are two internally disjoint xy-paths Po and P₁. (b) If z is on either Po or P₁, then combining Po and P₁ produces a cycle on which x, y, and z all lie. So assume that z is not on Po and not on P₁. Now prove that there are three paths Qo, Q1, and Q2 such that: ⚫each Qi starts at z; • each Qi ends at a vertex w; that is on Po or on P₁, where wo, w₁, and w₂ are distinct; the paths Qo, Q1, Q2 are disjoint from each other (except at the start vertex 2) and are disjoint from the paths Po and P₁ (except at the end vertices wo, W1, and w₂). (c) Use paths Po, P₁, Qo, Q1, and Q2 to prove that there is a cycle on which x, y, and z all lie. (To do this, notice that two of the w; must be on the same Pj.)arrow_forward
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