I am trying to confirm the integral test can be applied. I just cant see how the solution manual gets there solution.

I think there using the quotient rule but i cant seem to work it out.

Can someone help me work out the problem?

then,

Let

The solution manual then shows!

With the denominator squared it does show they use the quotient rule. However, can you please

show me the steps on how they derive the answer?

Because i cant seem to get it. Its kinda a nasty problem.

Thank you so very much!