Finding the expected value of position in a Potential Well

[BvU]

Okay you say that this is only half of the solution

And that only for $|z|\le L/2$. The wave function is nonzero there and contributes to $<z^2>$.

I'm not a textook. Read this from cover to cover. We (you) can't spend weeks on this topic.

 

[ja07019]

And that only for $|z|\le L/2$. The wave function is nonzero there and contributes to $<z^2>$.

Okay just one more question then, if the wavefunction is piecewise, how would you come up with the expected values? Does that require a transform?