Find the asymptotic behaviour of
$$\frac{\Gamma(n)}{\Gamma(n+\frac{6}{5}+i\frac{2}{7})}\ \ \ (n\rightarrow \infty)$$
I know we must use Stirling's formula. But I can't .Thank you
Find the asymptotic behaviour of
$$\frac{\Gamma(n)}{\Gamma(n+\frac{6}{5}+i\frac{2}{7})}\ \ \ (n\rightarrow \infty)$$
I know we must use Stirling's formula. But I can't .Thank you
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Thanks to Stirling formula, we have $$\frac{\Gamma(n)}{\Gamma(n+a)}\sim e^{-a\ln n}\left[1+O(n^{-1})\right].$$ as $n\rightarrow \infty$. If $a=\frac65+\frac{2i}{7}$ (and, more generally, if $\Re a>0$), the limit is clearly $0$.