Hi, I know this series converges.

n^4 * 2^-n

i used the direct comparison test with 1/2^n

however, i'm not sure why n^4 would = 1.

thanks for any help.

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- Jan 29th 2009, 12:59 PMrcmangoseries converges.
Hi, I know this series converges.

n^4 * 2^-n

i used the direct comparison test with 1/2^n

however, i'm not sure why n^4 would = 1.

thanks for any help. - Jan 29th 2009, 01:31 PMJester