I think the problem is asking you to choose a particular alpha and beta, and show that the expression on the left equals the Kronecker delta. Recall,
Let's do the example , where
See if you can do it for other choices of alpha and beta.
I think the problem is asking you to choose a particular alpha and beta, and show that the expression on the left equals the Kronecker delta. Recall,
Let's do the example , where
See if you can do it for other choices of alpha and beta.