# Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary func

1. Sep 17, 2008

### Lane

1. Evaluate the commutator [d^2/dx^2, x] by applying the operators to an arbitrary function f(x).

Last edited: Sep 17, 2008
2. Sep 17, 2008

### Dick

Re: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary

That's (x*f(x))''-x*f'''(x), isn't it? What's the result?

3. Sep 18, 2008

### Lane

Re: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary

I just found the answer it is: 2 d/dx

4. Sep 18, 2008

### Dick

Re: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary

I believe that's correct. Wasn't so hard, was it?