- #1
runforest
- 4
- 0
this question doesn't seem tough but i can't find anything like it.
[itex]\int\frac{e^{ax}}{1+e^{x}}dx[/itex] along the real line (a is between 1 and 0).
I know this is a complex analysis question, so i took the complex integral (along a semicircle where the diameter is the real numbers). by residue theorem, this integral is (2(Pi)i)*[sum of residues].
But now I am stuck, how do i get just the line integral on the real line, given the integral in the closed complex circle?
[itex]\int\frac{e^{ax}}{1+e^{x}}dx[/itex] along the real line (a is between 1 and 0).
I know this is a complex analysis question, so i took the complex integral (along a semicircle where the diameter is the real numbers). by residue theorem, this integral is (2(Pi)i)*[sum of residues].
But now I am stuck, how do i get just the line integral on the real line, given the integral in the closed complex circle?