magnifik
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Homework Statement
Determine whether the series converges absolutely, conditionally, or not at all.
a) \Sigma (-1)nn4/(x3 + 1)
b) \Sigma sin(x)/x2
Homework Equations
The Attempt at a Solution
a) positive series is n4/n3+1 .. do i do comparison test ??
b) |sin(x)|/x2
compare it with 1/x2 which converges.. so it's absolutely convergent??