- #1
fahraynk
- 186
- 6
Homework Statement
Uxx - SU = A ; 0<x<1
Boundary conditions :
Ux(0) = 0
U(1) = 0
The Attempt at a Solution
I tried to set a new variable W = u + A, I can get rid of the A in the main equation and U(1) becomes = 1.
If I set U= C*esqrt(S)x into the equation, its a trivial solution because of the boundary conditions C=0
If I plug U= -C*cos(sqrt(s)x) in, x=nπ if sqrt(s)=1,2,3.. but x <1, so I don't think this is viable...
How do I go about solving this analytically? Can someone point me in the right direction? Do I need to use Laplace transform or something?
Books answer = (A/S) * (cosh(x√s)-1)/cosh(√s)