Hello, scott.b89!

Use integration by parts: .

Could anyone please tell me where I'm going wrong?

It's hard to see your work from here,

but looks like you played the instead of the

. . and lost a term . . .

By parts: .

Then: .

By parts: .

Then: .

. . . . .

. . . . .

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Then they factored from the first and third terms.

. .

I've seen only a few textbooks that do that.