Many thanks for both your replies.
I think ideasrule's method was the one I am supposed to follow - managed to get the right answer! A few more clouds lifted...
thanks again
Homework Statement
I have been given the following problem -
the expectation value of px4 in the ground state of a harmonic oscillator can be expressed as
<px4> = h4/4a4 {integral(-infin to +infin w0*(x) (AAA+A+ + AA+AA+ + A+AAA+) w0 dx}
I think I know how to proceed on other...