Is Your Series Convergent or Divergent?

Charlie Brown
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PLEASE HELP!...Convergence and Divergence!

Can n e one help me with this! its determining whether or not a series is convergent or divergent...Thanks

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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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