When doing the initial conditions of the velocity of the wave function, why do they have a position (x) derivative (i.e. cF'(x)-cG'(x)=h(x)).(adsbygoogle = window.adsbygoogle || []).push({});

It appears in here.

http://en.wikipedia.org/wiki/D'Alembert's_formula

How someone explain how the c came about and why position derivatives are taken instead of time derivatives?

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# Homework Help: Wave equation

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