Test the series for convergence or divergence.
The sum figure from K=1 to infinity 2 / ((k^2)*(1+k^2))^(1/3)
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so what we conclude?
Convergent. Thanks! Why did you use 4/3?
from what i remember if it`s goes to zero faster then 1/x it is convergencing
and it does
(don`t have the proof with me)
ah, it's quite simple.
since it's for each then it's obvious that and you'll get the inequality.
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