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Asymptotic behavior of functions, asymptotic series and related topics

-2 votes
2 answers
461 views

Lower bound of q pochhammer symbol [closed]

How one could prove, that q pochhammer symbol $(1,1/n) = \prod_{k = 1}^{\infty}(1-\frac{1}{n^k}) \geq 1 - \frac{1}{n-1}$
Sergey Grigoryants's user avatar
5 votes
1 answer
292 views

Asymptotic of integral $\int_{1}^{e^n}(1-\frac{\ln(x)}{n})^n\,dx$

How could we find the large-$n$ asymptotic of $$\int_{1}^{e^n}\left(1-\frac{\ln x}{n}\right)^n\,dx.$$ I have a suspicion that this is $\sqrt{n}$.
Sergey Grigoryants's user avatar