Question 1:

I find the following integral formula from "Table of integrals" but I do not

know how to derive it.

where is the Digamma function.

Question 2:

How to get the answer for the slightly modifed integral:

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- June 4th 2008, 09:28 PMjibuzhuIntegrals \int^{\infty}_0 \ln(x)/\cosh^2(x) dx
Question 1:

I find the following integral formula from "Table of integrals" but I do not

know how to derive it.

where is the Digamma function.

Question 2:

How to get the answer for the slightly modifed integral: