Q.7. y"+6y'+73y = 80e* cos 4x Soln. The general solution is y=Y₁ +Yp The characteristic equation is λ = -6±√36-292 2

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Solve using the undetermined coefficient of differential equation
e-2x (-K cos x-Msin x)-4e2x (-K sin x +Mcos >
4(e-2x (-K sin x + M cos x) - 2e-2x (K cos x +Msin x))
=-Ke* cosx− Me-* sin x = e 2 sin 2x
Equating K = 0, M=-1, yp =-e2 sin x
Hence the general solution is y = y + y₂ = (c
Q.7.
y"+6y'+73y = 80e* cos 4x
Soln. The general solution is y=Y₁ +Yp
The characteristic equation is
λ =
2022/04/30 13:15
-6±√36-292
2
Transcribed Image Text:e-2x (-K cos x-Msin x)-4e2x (-K sin x +Mcos > 4(e-2x (-K sin x + M cos x) - 2e-2x (K cos x +Msin x)) =-Ke* cosx− Me-* sin x = e 2 sin 2x Equating K = 0, M=-1, yp =-e2 sin x Hence the general solution is y = y + y₂ = (c Q.7. y"+6y'+73y = 80e* cos 4x Soln. The general solution is y=Y₁ +Yp The characteristic equation is λ = 2022/04/30 13:15 -6±√36-292 2
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