- #1
Mattofix
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Homework Statement
I have done really well previous to these questions but i don't have a clue where to start any of them.
Do these converge?
i) Sum from n=1 to infinty of sin(2^n)/2^n
ii) Sum from n=1 to infinty of ncosn/(n^3 + logn)
iii) Sum from n=1 to infinty of (logn)^4/n^2
Homework Equations
Use comparison test but i can't get it them in a simple form or definitely prove it.
The Attempt at a Solution
i) yes
ii)yes
iii)unsure
No proof though...hmmmm...