# Math Help - series comparison test

1. ## series comparison test

here is the problem: ImageShack - Image Hosting :: 46660570xz5.jpg

i know the problem converges.

i'm not sure what to compare it to, using the direct or limit comparison test.

i did try to use n/(4^n)
it kinda looks like a geometric series, but not sure.

please help.

thanks.

2. $\frac{n-1}{n \cdot 4^n} < \frac{1}{4^n} = \left(\frac{1}{4}\right)^n$

3. thankyou, i didn't see it that way, until now