Confirming Convergence: $\sum \frac{(-1)^{n+1}(n^2+4)^{1/3}}{(n^5+1)^{1/2}}$

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SUMMARY

The series $\sum \frac{(-1)^{n+1}(n^2+4)^{1/3}}{(n^5+1)^{1/2}}$ converges based on the Alternating Series Test. The necessary conditions for convergence were confirmed: the terms $a_n = \frac{(n^2+4)^{1/3}}{(n^5+1)^{1/2}}$ are positive, the sequence is monotonically decreasing, and the limit of $a_n$ approaches 0 as $n$ approaches infinity. Therefore, the series satisfies all criteria for convergence.

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Homework Statement



[tex]\sum \frac{(-1)^{n+1}(n^2+4)^{1/3}}{(n^5+1)^{1/2}}[/tex]

Homework Equations



The Attempt at a Solution



I got that it converges, because the limit is 0
Is that right?
 
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You apparently are using the alternating series test. Have you established all of the following?
The a_n's are all positive.
a_n >= a_(n+1) for all n.
lim a_n = 0, as n approaches infinity.
 

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