1. The problem statement, all variables and given/known data Find ∫e^x/ (1+e^2x). dx , with limits ln 2 & 0 given u= e^x 2. Relevant equations 3. The attempt at a solution u= e^x du/dx = e^x dx= du/e^x sub limits of ln2 & 0 → u Hence, limits 2 & 1 Therefore, ∫u* (1+e^2x)^-1* du/e^x = ∫ u/ (u + e^3x) = ∫ u/ e^3x = ∫ 1/e^2x = -e^-x = -1/u plugging in limits of 2 &1 Therefore, 0.2325... Although i could not find this on the answer sheet did i do something wrong? Please help, Thankyou.