Limits of convergent sequences

cathy
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Homework Statement



an= (n/n+2)^n

ANS: 1/e^2

The Attempt at a Solution



I was told this was convergent and I need to find the limit of the sequence. How do I do this, as I seem to keep getting that this is divergent. Isn't it divergent to infinity? Or am I missing something?
 
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Actually, this was silly of me. I figured it out.
 
Good. But as a reminder, ##\frac n n +2 = 1+2 = 3## so ##a_n = 3^n##. If you meant something else you should either use Latex or use proper parentheses.
 
Last edited:
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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