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Question: How do I solve the diff eqn ???

Question:How do I solve the diff eqn ???

amiya620 0
ode dsolve
August 23 2012
0

I want to solve a diff eqn, but it is giving absurd answer.

> ode := diff(f(x), x, x) = (Phi(x)-lambda)*f(x);
                    d  / d      \                         
                   --- |--- f(x)| = (Phi(x) - lambda) f(x)
                    dx \ dx     /                         
> dsolve(ode);
               / /                           / d  / d       \\\          \
   f(x) = DESol|{ (-Phi(x) + lambda) _Y(x) + |--- |--- _Y(x)|| }, {_Y(x)}|
               \ \                           \ dx \ dx      ///          /
 
Here, Phi(x) is some functon for x
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