Calculate Limit - Wolfram Alpha

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Calculate the limit of :

[PLAIN]http://www3.wolframalpha.com/Calculate/MSP/MSP3119g718e25g367ahi000057f7afh4fdhed60b?MSPStoreType=image/gif&s=9&w=150&h=57

Thanks for the help.
 
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Hi puzzek! :smile:

Can you rewrite this series to a Riemann sum. That is, rewrite it to the form

\sum_{k=1}^{+\infty}{f(\frac{k}{n})\frac{1}{n}}

for a function f. Wshy should you do this? Well, since you know that

\lim_{n\rightarrow +\infty}{\sum_{k=1}^{+\infty}{f(\frac{k}{n})\frac{1}{n}}}=\int_0^1{f(x)dx}
 
micromass Thank you!

your tip made it a lot easier !
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...

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