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I am to find the sum of a series that takes this format
$ \sum_{i=1}^{n}\frac{1}{i^\beta} $
$ \beta $ is a positive real number
How to approach the partial sum of the above series and can obtain its estimation as below
$ \approx\frac{n^{1-\beta}}{1-\beta} $
Thanks a lot for any help
Hint:compare with the integral $$\int_1^n \frac{dx}{x^\beta}.$$