happyg1
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hi,
I'm working on thiis:
.25 = \int_{-\infty}^m\frac{e^{x}}{(1+e^{-x})^2}dx
I let u=1+e^{-x} , du=-e{-x}dx
which gives:
\frac{1}{u}=\frac{1}{1+e^{-x}}|_{-\infty}^m
then I solve it out and I get
\frac{1}{1+e^{-m}}-1=.25
I have tried to solve this and I keep getting a negative ln. I moved the 1 to the RHS and then took ln of both sides. I can't get it to work.
help
CC
I'm working on thiis:
.25 = \int_{-\infty}^m\frac{e^{x}}{(1+e^{-x})^2}dx
I let u=1+e^{-x} , du=-e{-x}dx
which gives:
\frac{1}{u}=\frac{1}{1+e^{-x}}|_{-\infty}^m
then I solve it out and I get
\frac{1}{1+e^{-m}}-1=.25
I have tried to solve this and I keep getting a negative ln. I moved the 1 to the RHS and then took ln of both sides. I can't get it to work.
help
CC