- #1
MaximumTaco
- 45
- 0
Integrating 1/(1+e^x):
I am currently substituting 1+e^x = u,
S (u*e^x)^-1 du since du/dx = e^x
S (u*(u-1))^-1 du (S represents the integral symbol)
But i looked up the answer and got Ln (e^x(1+e^x)) +c
i need to understand how this is done, thanks in advance everyone.
I am currently substituting 1+e^x = u,
S (u*e^x)^-1 du since du/dx = e^x
S (u*(u-1))^-1 du (S represents the integral symbol)
But i looked up the answer and got Ln (e^x(1+e^x)) +c
i need to understand how this is done, thanks in advance everyone.