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- May 9th 2009, 01:36 AM #1

- May 9th 2009, 04:03 AM #2

- May 9th 2009, 12:05 PM #3

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Or, since x appears neither explictely nor as a variable of differentiation, ignore the fact that it is a partial differential equation!

The problem can be written as and is a separable equation: . Integrating, so, taking the exponential of both sides, .

Finally, use the fact that we have been ignoring x- that is, treating it like a constant: the constant C' might be any function of x. If we call that "F(x)" then we have where F(x) is an arbitrary function of x, exactly the solution mr. fantastic got.