Monday, November 23, 2015

complex analysis - How to show that for $|a|

Show that for $|a|<1$:
$$\int_0^\infty\frac{x^a}{(x+2)^2}\,dx=\frac{a\pi2^{a-1}}{\sin\pi a}$$

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analysis - Injection, making bijection

I have injection $f \colon A \rightarrow B$ and I want to get bijection. Can I just resting codomain to $f(A)$? I know that every function i...