# Need help on this differential equation

## Homework Statement

Well this is a physics problem, need find the potential function

## Homework Equations

$\Psi$ =Axe-kx A and k are constants
I need to find d2 $\Psi$/dx2

## The Attempt at a Solution

I thought u would just take the derivative two times
but just d$\Psi$/dx = Ae-kx-kAxe-kx
Would i do something like this?
http://tutorial.math.lamar.edu/Classes/DE/Linear.aspx
thanks

vela
Staff Emeritus
Homework Helper
What's the problem with just differentiating it again?

i forgot how you do a differential equation, i have the solutions. I want to know how you do the dΨ/dx
i thought it would just be dΨ/dx= -A/ke-kx Its been a long summer lol

vela
Staff Emeritus