- #1

kiwi101

- 26

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## Homework Statement

Prove by direct substitution that any twice differentiable function of (t-R[itex]\sqrt{με}[/itex]) or of (t+R[itex]\sqrt{με}[/itex]) is a solution of the homogeneous wave equation.

## Homework Equations

Homogeneous wave equation = ∂

^{2}U/ ∂R

^{2}- με ∂

^{2}U/∂t

^{2}= 0

## The Attempt at a Solution

Could you guys give me a direction or a way I should think. I have no idea on how I should approach this problem.

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