int e^(-x)log(e^(x)+1)dx

If I=inte^(-x)log(e^x+1)dx ,t h e nIe q u a l a+(e^(-x)+1)log(e^x+1)+C a+(e^x+1)log(e^x+1)+C a-(e^(-x)+1)log(e^x+1)+C none of these

inte^(-x)log(e^x+1)dx

int e^(x log a).e^(x) dx =

int e^(x log a) e^(x)dx=

" (2) "int e^(x log e)dx

int e^(x) (e^(log x)+1) dx

" (i) "int e^(x)[e^(log x)+1]dx

int log(e^(x)+1)(e^(x))dx

int e^(x log e^(a))dx