Differential Equation with Boundary Conditions II

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Homework Statement


d^2T/dx^2 + S^2*T+B=0
Boundary Conditions:
dT/dx=0 @ x=0
T=T_2 @ x=L


Homework Equations





The Attempt at a Solution


I think you either have to make some type of substitution or find the roots and do it that way.


P.S. This is assignment is a review of diff eq for Heat Transfer
I took diff eq 2 years ago and haven't used is since until now but its quickly coming back to me. Just looking for someone to point me in the right direction. Thanks

Homework Statement

 
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this is a non-homogenous (though that has several different meanings) 2nd order ODE

so i would write it as
d^2T/dx^2 + S^2T=-B

find the complementary solutinos by solving
d^2T/dx^2 + S^2T=0

and then try and find a particular solution
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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