int(1)/(1+e^(x))dx" is equal to "

int(1)/(e^(x)+1)dx is equal to

int(1)/(e^(x)+1)dx is equal to

int(1)/(e^(x)-1)dx is equal to

int1/(1+e^(x))dx is equal to

int1/(1+e^(x))dx is equal to

int1/(1+e^(x))dx is equal to

What is int (1)/(1 + e^(x))dx equal to ? where c is a constant of integration

Let f(x) be a continuous function such that f(a-x)+f(x)=0 for all x in [0,a] . Then, the value of the integral overset(a)underset(0)int (1)/(1+e^(f(x)))dx is equal to

int(e^x)/(e^(x)+1)dx" is equal to "

int(1+x)/(x+e^(-x))dx is equal to