I da By making the linear transformation 21 = y₁ ay2, 22 = 2y1 + y2 S[y1, y2] = = dx [y² + 2y2 + (2y1 + y2)²].

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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S[y₁, 92] = [ dx [y² + 2y/² + (2y1 + y2)²].
By making the linear transformation
21 = y₁ + ay2, 22 = 2y1 + y2
*
Find the general solution of the Euler-Lagrange equations for (2₁, 22),
and hence find the general solution for (y₁,Y2).
Transcribed Image Text:S[y₁, 92] = [ dx [y² + 2y/² + (2y1 + y2)²]. By making the linear transformation 21 = y₁ + ay2, 22 = 2y1 + y2 * Find the general solution of the Euler-Lagrange equations for (2₁, 22), and hence find the general solution for (y₁,Y2).
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Follow-up Question
Verify by direct substitution that your general solution for (y₁, Y2)
satisfies the Euler-Lagrange equations 4(zy, +₂) - zy₁" = 0 for y₁
)
&
2 (²y₁ + y₂) - 4 y₂²" = 0
>
for
y₂.
Transcribed Image Text:Verify by direct substitution that your general solution for (y₁, Y2) satisfies the Euler-Lagrange equations 4(zy, +₂) - zy₁" = 0 for y₁ ) & 2 (²y₁ + y₂) - 4 y₂²" = 0 > for y₂.
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