1.\int \frac{dx}{(e^{2x} + 1)^2} =a.2(e^{2x}+1)^{-1} + Cb.-2(e^{2x}+1)^{-1} + cc.3(e^{2x}+1)^{-1} + Cd.(e^{2x}+1)^{-1} + CLogin to continueOnly logged in users canattempt or see the solution.
