Answer to Question #40702 in Calculus for soyong

Question #40702

Determine whether each of the following converges or diverges:
∞
1)∑ 1/n^2+1
n-1

∞
2) ∑ 2^n+5/3^n
n-0

∞
3) ∑ sin k/k^2
k-1

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