Explanation Given Information: The function with two variables is f ( x , y ) = 1 − x 2 16 − y 2 4 . Formula used: The second partial derivative test for a multivariate function f ( x , y ) . Equate the first partial derivative of the function to 0. ∂ f ∂ x = 0 and ∂ f ∂ y = 0 To test the relative extrema of the function Step 1: Find the second partial derivative of the function, f x x , f y y , and f x y Step 2: Evaluate the quantity, d = f x x ( a , b ) f y y ( a , b ) − [ f x y ( a , b ) ] 2 Step 3: Estimate the nature of d . If the value of d is positive and f x x ( a , b ) > 0 , so the function has a relative minimum. If the value of d is positive and f x x ( a , b ) < 0 , so the function has a relative maximum. If the value of d is negative do, the function has a saddle point at ( a , b ) . Calculation: Considering the provided function, f ( x , y ) = 1 − x 2 16 − y 2 4 Use the simple power rule to differentiate the provided function keeping y as a constant. ∂ f ∂ x = ∂ ∂ x ( 1 − x 2 16 − y 2 4 ) = 1 2 1 − x 2 16 − y 2 4 ( − 2 x 16 ) = − x 16 1 − x 2 16 − y 2 4 Equate the first derivative of function with respect to x to zero, − x 16 1 − x 2 16 − y 2 4 = 0 x = 0 Use the simple power rule to differentiate the provided function keeping x as a constant. ∂ f ∂ y = ∂ ∂ y ( 1 − x 2 16 − y 2 4 ) = 1 2 1 − x 2 16 − y 2 4 ( − 2 y 4 ) = − y 4 1 − x 2 16 − y 2 4 Equate the first derivative of function with respect to y to zero, − y 4 1 − x 2 16 − y 2 4 = 0 y = 0 The critical point of function f ( x , y ) = 1 − x 2 16 − y 2 4 is ( 0 , 0 ) . Now, find the second partial derivative of the derivative function ∂ f ∂ x = − x 16 1 − x 2 16 − y 2 4 with respect to x . ∂ ∂ x ( ∂ f ∂ x ) = ∂ ∂ x ( − x 16 1 − x 2 16 − y 2 4 ) f x x ( x , y ) = − x ( ∂ ∂ x [ 16 1 − x 2 16 − y 2 4 ] ) − ( 16 1 − x 2 16 − y 2 4 ) ( ∂ ∂ x [ − x ] ) ( 16 1 − x 2 16 − y 2 4 ) 2 = − x ( 16 ( 1 2 1 − x 2 16 − y 2 4 ( − 2 x 16 ) ) ) − ( 16 1 − x 2 16 − y 2 4 ) ( − 1 ) ( 256 [ 1 − x 2 16 − y 2 4 ] ) = ( ( − x 2 1 − x 2 16 − y 2 4 ) ) + ( 16 1 − x 2 16 − y 2 4 ) ( 256 [ 1 − x 2 16 − y 2 4 ] ) Simplify further f x x ( x , y ) = = − x 2 + ( 16 ( 1 − x 2 16 − y 2 4 ) ) 256 ( 1 − x 2 16 − y 2 4 ) 3 2 = − x 2 + ( ( 16 − x 2 − 4 y 2 ) ) 256 ( 1 − x 2 16 − y 2 4 ) 3 2 = 16 − 4 y 2 − 2 x 2 256 ( 1 − x 2 16 − y 2 4 ) 3 2 Now, find the second partial derivative of the derivative function ∂ f ∂ y = − y 4 1 − x 2 16 − y 2 4 with respect to y

Calculus: An Applied Approach (MindTap Course List)

10th Edition

ISBN: 9781305860919

Author: Ron Larson

Publisher: Cengage Learning

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Chapter 7.5, Problem 2CP

To determine

To calculate: The relative extrema of function f(x,y)=1−x216−y24.

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Chapter 7.5, Problem 1CP

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Calculus: An Applied Approach (MindTap Course List)

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Finding Second Partial Derivatives In Exercises...Ch. 7.4 - Marginal Cost A company manufactures mountain...Ch. 7.4 - Prob. 62E Ch. 7.4 - Prob. 63E Ch. 7.4 - Prob. 64E Ch. 7.4 - Prob. 65E Ch. 7.4 - Prob. 66E Ch. 7.4 - Prob. 67E Ch. 7.4 - Prob. 68E Ch. 7.4 - Prob. 69E Ch. 7.4 - Investment The value of an investment of $ 100...Ch. 7.4 - Prob. 72E Ch. 7.4 - Prob. 73E Ch. 7.5 - Prob. 1CP Ch. 7.5 - Prob. 2CP Ch. 7.5 - Find the relative extrema and saddle points of...Ch. 7.5 - Prob. 4CP Ch. 7.5 - Prob. 5CP Ch. 7.5 - Prob. 1SWU Ch. 7.5 - Prob. 2SWU Ch. 7.5 - Prob. 3SWU Ch. 7.5 - Prob. 4SWU Ch. 7.5 - Prob. 5SWU Ch. 7.5 - Prob. 6SWU Ch. 7.5 - Prob. 7SWU Ch. 7.5 - Prob. 8SWU Ch. 7.5 - Prob. 9SWU Ch. 7.5 - Prob. 10SWU Ch. 7.5 - Prob. 11SWU Ch. 7.5 - Prob. 12SWU Ch. 7.5 - Prob. 13SWU Ch. 7.5 - Prob. 14SWU Ch. 7.5 - Prob. 1E Ch. 7.5 - Prob. 2E Ch. 7.5 - Prob. 3E Ch. 7.5 - Prob. 4E Ch. 7.5 - Prob. 5E Ch. 7.5 - Prob. 6E Ch. 7.5 - Prob. 7E Ch. 7.5 - Prob. 8E Ch. 7.5 - Prob. 9E Ch. 7.5 - Prob. 10E Ch. 7.5 - 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Cost An automobile manufacturer has determined...Ch. 7.5 - Prob. 50E Ch. 7.5 - Biology A lake is to be stocked with smallmouth...Ch. 7.5 - Prob. 53E Ch. 7.5 - Shannon Diversity Index One way to measure species...Ch. 7.5 - Prob. 55E Ch. 7.5 - Prob. 56E Ch. 7.5 - Prob. 1QY Ch. 7.5 - Prob. 2QY Ch. 7.5 - Prob. 3QY Ch. 7.5 - Prob. 4QY Ch. 7.5 - Prob. 5QY Ch. 7.5 - Prob. 6QY Ch. 7.5 - Prob. 7QY Ch. 7.5 - Prob. 8QY Ch. 7.5 - Prob. 9QY Ch. 7.5 - Prob. 10QY Ch. 7.5 - Prob. 11QY Ch. 7.5 - Prob. 12QY Ch. 7.5 - Prob. 13QY Ch. 7.5 - Prob. 14QY Ch. 7.5 - Prob. 15QY Ch. 7.5 - Prob. 16QY Ch. 7.5 - Prob. 17QY Ch. 7.5 - Prob. 18QY Ch. 7.5 - Prob. 19QY Ch. 7.5 - Prob. 20QY Ch. 7.5 - Prob. 21QY Ch. 7.5 - Prob. 22QY Ch. 7.5 - Prob. 23QY Ch. 7.5 - Prob. 24QY Ch. 7.5 - Prob. 25QY Ch. 7.5 - Prob. 26QY Ch. 7.6 - Find the maximum volume of V=xyz subject to the...Ch. 7.6 - Prob. 2CP Ch. 7.6 - Prob. 3CP Ch. 7.6 - Prob. 4CP Ch. 7.6 - Prob. 1SWU Ch. 7.6 - Prob. 2SWU Ch. 7.6 - Prob. 3SWU Ch. 7.6 - Prob. 4SWU Ch. 7.6 - Prob. 5SWU Ch. 7.6 - Prob. 6SWU Ch. 7.6 - Prob. 7SWU Ch. 7.6 - Prob. 8SWU Ch. 7.6 - Prob. 9SWU Ch. 7.6 - Prob. 10SWU Ch. 7.6 - Prob. 1E Ch. 7.6 - Prob. 2E Ch. 7.6 - Prob. 3E Ch. 7.6 - Prob. 4E Ch. 7.6 - Prob. 5E Ch. 7.6 - Prob. 6E Ch. 7.6 - Prob. 7E Ch. 7.6 - Prob. 8E Ch. 7.6 - Prob. 9E Ch. 7.6 - Using Lagrange Multipliers In Exercises 1-12, use...Ch. 7.6 - Prob. 11E Ch. 7.6 - Prob. 12E Ch. 7.6 - Prob. 13E Ch. 7.6 - Prob. 14E Ch. 7.6 - Prob. 15E Ch. 7.6 - Prob. 16E Ch. 7.6 - Prob. 17E Ch. 7.6 - Prob. 18E Ch. 7.6 - Prob. 19E Ch. 7.6 - Prob. 20E Ch. 7.6 - Prob. 21E Ch. 7.6 - Prob. 22E Ch. 7.6 - Prob. 23E Ch. 7.6 - Prob. 24E Ch. 7.6 - Prob. 25E Ch. 7.6 - Prob. 26E Ch. 7.6 - Finding Distance In Exercises 23-28, find the...Ch. 7.6 - Prob. 28E Ch. 7.6 - Volume A rectangular box is resting on the...Ch. 7.6 - Prob. 30E Ch. 7.6 - Cost In redecorating an office, the cost for new...Ch. 7.6 - Cost A cargo container (in the shape of a...Ch. 7.6 - Cost A manufacturer has an order for 1000 units of...Ch. 7.6 - Prob. 34E Ch. 7.6 - Prob. 35E Ch. 7.6 - Prob. 36E Ch. 7.6 - Prob. 37E Ch. 7.6 - Least-Cost Rule Repeat Exercise 37 for the...Ch. 7.6 - Construction An animal shelter plans to use the...Ch. 7.6 - Office Space Partitions will be used in an office...Ch. 7.6 - Biology A microbiologist must prepare a culture...Ch. 7.6 - Prob. 42E Ch. 7.6 - Nutrition The number of grams of your favorite ice...Ch. 7.6 - HOW DO YOU SEE IT? The graphs show the constraint...Ch. 7.6 - Prob. 45E Ch. 7.7 - Prob. 1CP Ch. 7.7 - Prob. 2CP Ch. 7.7 - Prob. 3CP Ch. 7.7 - Prob. 1SWU Ch. 7.7 - Prob. 2SWU Ch. 7.7 - Prob. 3SWU Ch. 7.7 - Prob. 4SWU Ch. 7.7 - Prob. 5SWU Ch. 7.7 - Prob. 6SWU Ch. 7.7 - Prob. 7SWU Ch. 7.7 - Prob. 8SWU Ch. 7.7 - Prob. 1E Ch. 7.7 - Prob. 2E Ch. 7.7 - Prob. 3E Ch. 7.7 - Prob. 4E Ch. 7.7 - Prob. 5E Ch. 7.7 - Prob. 6E Ch. 7.7 - Prob. 7E Ch. 7.7 - Prob. 8E Ch. 7.7 - Prob. 9E Ch. 7.7 - Prob. 10E Ch. 7.7 - Prob. 11E Ch. 7.7 - Prob. 12E Ch. 7.7 - Prob. 13E Ch. 7.7 - Prob. 14E Ch. 7.7 - Prob. 15E Ch. 7.7 - Demand A hardware retailer wants to know the...Ch. 7.7 - Prob. 17E Ch. 7.7 - HOW DO YOU SEE IT? Match the regression equation...Ch. 7.7 - Prob. 19E Ch. 7.7 - Prob. 20E Ch. 7.7 - Prob. 21E Ch. 7.7 - Prob. 22E Ch. 7.7 - Prob. 23E Ch. 7.7 - Prob. 24E Ch. 7.7 - Prob. 25E Ch. 7.7 - Prob. 26E Ch. 7.7 - Prob. 27E Ch. 7.7 - Prob. 28E Ch. 7.7 - Prob. 29E Ch. 7.7 - Prob. 30E Ch. 7.8 - Prob. 1CP Ch. 7.8 - Prob. 2CP Ch. 7.8 - Prob. 3CP Ch. 7.8 - Prob. 4CP Ch. 7.8 - Prob. 5CP Ch. 7.8 - Prob. 6CP Ch. 7.8 - Prob. 1SWU Ch. 7.8 - Prob. 2SWU Ch. 7.8 - Prob. 3SWU Ch. 7.8 - Prob. 4SWU Ch. 7.8 - Prob. 5SWU Ch. 7.8 - Prob. 6SWU Ch. 7.8 - Prob. 7SWU Ch. 7.8 - Prob. 8SWU Ch. 7.8 - Prob. 9SWU Ch. 7.8 - Prob. 10SWU Ch. 7.8 - Prob. 11SWU Ch. 7.8 - Prob. 12SWU Ch. 7.8 - Prob. 13SWU Ch. 7.8 - Prob. 14SWU Ch. 7.8 - Prob. 15SWU Ch. 7.8 - Prob. 16SWU Ch. 7.8 - Prob. 1E Ch. 7.8 - Finding Partial Integrals In Exercises 1-10, find...Ch. 7.8 - Prob. 3E Ch. 7.8 - Prob. 4E Ch. 7.8 - Prob. 5E Ch. 7.8 - Prob. 6E Ch. 7.8 - Prob. 7E Ch. 7.8 - Prob. 8E Ch. 7.8 - Prob. 9E Ch. 7.8 - Prob. 10E Ch. 7.8 - Prob. 11E Ch. 7.8 - Prob. 12E Ch. 7.8 - 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Prob. 50E Ch. 7.8 - Prob. 51E Ch. 7.8 - Prob. 52E Ch. 7.8 - Prob. 53E Ch. 7.8 - Prob. 54E Ch. 7.8 - Prob. 55E Ch. 7.8 - Prob. 56E Ch. 7.8 - Prob. 57E Ch. 7.8 - Prob. 58E Ch. 7.8 - Prob. 59E Ch. 7.8 - Prob. 60E Ch. 7.9 - Find the volume of the solid region hounded in the...Ch. 7.9 - Prob. 2CP Ch. 7.9 - Prob. 3CP Ch. 7.9 - Prob. 4CP Ch. 7.9 - Prob. 5CP Ch. 7.9 - Prob. 1SWU Ch. 7.9 - Prob. 2SWU Ch. 7.9 - Prob. 3SWU Ch. 7.9 - Prob. 4SWU Ch. 7.9 - Prob. 5SWU Ch. 7.9 - Prob. 6SWU Ch. 7.9 - Prob. 7SWU Ch. 7.9 - Prob. 8SWU Ch. 7.9 - Prob. 9SWU Ch. 7.9 - Prob. 10SWU Ch. 7.9 - Prob. 1E Ch. 7.9 - Prob. 2E Ch. 7.9 - Prob. 3E Ch. 7.9 - Finding the Volume of a Solid Region In Exercises...Ch. 7.9 - Prob. 5E Ch. 7.9 - Prob. 6E Ch. 7.9 - Prob. 7E Ch. 7.9 - Prob. 8E Ch. 7.9 - Prob. 9E Ch. 7.9 - Prob. 10E Ch. 7.9 - Prob. 11E Ch. 7.9 - Prob. 12E Ch. 7.9 - Prob. 13E Ch. 7.9 - Prob. 14E Ch. 7.9 - Finding the Volume of a Solid Region In Exercises...Ch. 7.9 - Prob. 16E Ch. 7.9 - Prob. 17E Ch. 7.9 - Finding the Volume of a Solid Region In Exercises...Ch. 7.9 - Prob. 19E Ch. 7.9 - Prob. 20E Ch. 7.9 - Prob. 21E Ch. 7.9 - Prob. 22E Ch. 7.9 - Prob. 23E Ch. 7.9 - Prob. 24E Ch. 7.9 - Prob. 25E Ch. 7.9 - Population Density The population density (in...Ch. 7.9 - Prob. 27E Ch. 7.9 - Prob. 28E Ch. 7.9 - Prob. 29E Ch. 7.9 - Prob. 30E Ch. 7.9 - Average Weekly Profit A firms weekly profit P (in...Ch. 7.9 - Prob. 32E Ch. 7.9 - Prob. 33E Ch. 7.9 - Prob. 34E Ch. 7.9 - Prob. 35E Ch. 7.9 - Prob. 36E Ch. 7 - Plotting Points in Space In Exercises 1 and 2,...Ch. 7 - Prob. 2RE Ch. 7 - Prob. 3RE Ch. 7 - Prob. 4RE Ch. 7 - Prob. 5RE Ch. 7 - Prob. 6RE Ch. 7 - Prob. 7RE Ch. 7 - Prob. 8RE Ch. 7 - Prob. 9RE Ch. 7 - Prob. 10RE Ch. 7 - Prob. 11RE Ch. 7 - Prob. 12RE Ch. 7 - Finding a Trace of a Sphere In Exercises 13 and...Ch. 7 - Prob. 14RE Ch. 7 - Prob. 15RE Ch. 7 - Prob. 16RE Ch. 7 - Prob. 17RE Ch. 7 - Prob. 18RE Ch. 7 - Prob. 19RE Ch. 7 - Prob. 20RE Ch. 7 - Prob. 21RE Ch. 7 - Prob. 22RE Ch. 7 - Prob. 23RE Ch. 7 - Prob. 24RE Ch. 7 - Prob. 25RE Ch. 7 - Prob. 26RE Ch. 7 - Prob. 27RE Ch. 7 - Prob. 28RE Ch. 7 - Prob. 29RE Ch. 7 - Prob. 30RE Ch. 7 - Prob. 31RE Ch. 7 - Prob. 32RE Ch. 7 - Prob. 33RE Ch. 7 - Prob. 34RE Ch. 7 - Prob. 35RE Ch. 7 - Prob. 36RE Ch. 7 - Prob. 37RE Ch. 7 - Prob. 38RE Ch. 7 - Prob. 39RE Ch. 7 - Prob. 40RE Ch. 7 - Prob. 41RE Ch. 7 - Prob. 42RE Ch. 7 - Prob. 43RE Ch. 7 - Prob. 44RE Ch. 7 - Prob. 45RE Ch. 7 - Prob. 46RE Ch. 7 - Prob. 47RE Ch. 7 - Prob. 48RE Ch. 7 - Prob. 49RE Ch. 7 - Prob. 50RE Ch. 7 - Prob. 51RE Ch. 7 - Prob. 52RE Ch. 7 - Prob. 53RE Ch. 7 - Prob. 54RE Ch. 7 - Prob. 55RE Ch. 7 - Prob. 56RE Ch. 7 - Prob. 57RE Ch. 7 - Prob. 58RE Ch. 7 - Prob. 59RE Ch. 7 - Prob. 60RE Ch. 7 - Prob. 61RE Ch. 7 - Prob. 62RE Ch. 7 - Prob. 63RE Ch. 7 - Prob. 64RE Ch. 7 - Prob. 65RE Ch. 7 - Prob. 66RE Ch. 7 - Prob. 67RE Ch. 7 - Prob. 68RE Ch. 7 - Prob. 69RE Ch. 7 - Prob. 70RE Ch. 7 - Prob. 71RE Ch. 7 - Prob. 72RE Ch. 7 - Prob. 73RE Ch. 7 - Prob. 74RE Ch. 7 - Prob. 75RE Ch. 7 - Prob. 76RE Ch. 7 - Prob. 77RE Ch. 7 - Prob. 78RE Ch. 7 - Prob. 79RE Ch. 7 - Prob. 80RE Ch. 7 - Prob. 81RE Ch. 7 - Prob. 82RE Ch. 7 - Prob. 83RE Ch. 7 - Prob. 84RE Ch. 7 - Prob. 85RE Ch. 7 - Prob. 86RE Ch. 7 - Evaluating a Double Integral In Exercises 85-88,...Ch. 7 - Prob. 88RE Ch. 7 - Prob. 89RE Ch. 7 - Prob. 90RE Ch. 7 - Finding Area with a Double Integral In Exercises...Ch. 7 - Finding Area with a Double Integral In Exercises...Ch. 7 - Finding the Volume of a Solid Region In Exercises...Ch. 7 - Prob. 94RE Ch. 7 - Prob. 95RE Ch. 7 - Prob. 96RE Ch. 7 - Prob. 97RE Ch. 7 - Prob. 98RE Ch. 7 - Prob. 99RE Ch. 7 - Prob. 100RE Ch. 7 - Prob. 101RE Ch. 7 - Average Revenue A company sells two products whose...Ch. 7 - Prob. 103RE Ch. 7 - Average Production Repeat Exercise 103 for the...Ch. 7 - Prob. 1TYS Ch. 7 - Prob. 2TYS Ch. 7 - Prob. 3TYS Ch. 7 - Prob. 4TYS Ch. 7 - Prob. 5TYS Ch. 7 - Prob. 6TYS Ch. 7 - Prob. 7TYS Ch. 7 - Prob. 8TYS Ch. 7 - Prob. 9TYS Ch. 7 - Prob. 10TYS Ch. 7 - Prob. 11TYS Ch. 7 - Prob. 12TYS Ch. 7 - Prob. 13TYS Ch. 7 - Prob. 14TYS Ch. 7 - Prob. 15TYS Ch. 7 - Prob. 16TYS Ch. 7 - Prob. 17TYS Ch. 7 - Prob. 18TYS Ch. 7 - Prob. 19TYS Ch. 7 - Prob. 20TYS Ch. 7 - Prob. 21TYS Ch. 7 - Prob. 22TYS

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The relative extrema of function f ( x , y ) = 1 − x 2 16 − y 2 4 .

Solution Summary: The author explains the second partial derivative test for a multivariate function f(x,y).

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To calculate: The relative extrema of function f(x,y)=1−x216−y24.

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Chapter 7 Solutions