
Calculus: Early Transcendentals
8th Edition
ISBN: 9781285741550
Author: James Stewart
Publisher: Cengage Learning
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Question
What is the value of λ?
![Consider the functional
S[y] = ay(1)² + [[* dx ßy², y(0) = 0,
with a natural boundary condition at x = = 1 and subject to the constraint
C[y]=ry(1)² + [* dx w(x) y² = 1,
where a, ẞ and y are nonzero constants.
Euler-Lagrange equation
β
d²y
dx2
+\w(x)y=0, y(0) = 0, (a− yλ) y(1) + ßy' (1) = 0,
where is a Lagrange multiplier.](https://content.bartleby.com/qna-images/question/a6c8ed7d-75cc-4e27-869e-3ad6a1efc0b4/4d204e83-4de2-4840-ab56-cbeb208aa15e/oev7o2r_thumbnail.jpeg)
Transcribed Image Text:Consider the functional
S[y] = ay(1)² + [[* dx ßy², y(0) = 0,
with a natural boundary condition at x = = 1 and subject to the constraint
C[y]=ry(1)² + [* dx w(x) y² = 1,
where a, ẞ and y are nonzero constants.
Euler-Lagrange equation
β
d²y
dx2
+\w(x)y=0, y(0) = 0, (a− yλ) y(1) + ßy' (1) = 0,
where is a Lagrange multiplier.
![Euler- Lagrange eft. is
py" + 1 way=0
7
y" + dy
,
since A = 1, W(X) = 1
The general solution is
y (x) = As in (√xx) + B cos (√xx) where A and B
when y =0
B = 0
>
are constants.
heme, yox) = A sin (Dx)
110=0
When (α-rd) y (1) + By '10.
(1-1) A sin √π +
y'α>
(1) = 0
since α =
,
x = 8 = p²l
⇒ (1-1) A sint + A√ cos t = 0
A
Sin√√
C[y]=1
1
√ cos√λ = 0
1 - A² So Sin ² (√XX) =
=
⇒ 1 = A²
The nontrivial
Az √2
stationary
parth is
g(x)=
√2 sin (√xx)](https://content.bartleby.com/qna-images/question/a6c8ed7d-75cc-4e27-869e-3ad6a1efc0b4/4d204e83-4de2-4840-ab56-cbeb208aa15e/2porx3h_thumbnail.jpeg)
Transcribed Image Text:Euler- Lagrange eft. is
py" + 1 way=0
7
y" + dy
,
since A = 1, W(X) = 1
The general solution is
y (x) = As in (√xx) + B cos (√xx) where A and B
when y =0
B = 0
>
are constants.
heme, yox) = A sin (Dx)
110=0
When (α-rd) y (1) + By '10.
(1-1) A sin √π +
y'α>
(1) = 0
since α =
,
x = 8 = p²l
⇒ (1-1) A sint + A√ cos t = 0
A
Sin√√
C[y]=1
1
√ cos√λ = 0
1 - A² So Sin ² (√XX) =
=
⇒ 1 = A²
The nontrivial
Az √2
stationary
parth is
g(x)=
√2 sin (√xx)
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