(adsbygoogle = window.adsbygoogle || []).push({}); Find the interval of convergence for the given power series.

[PLAIN]http://img52.imageshack.us/img52/3632/c1786dba870d63ff1a827d9.png [Broken]

The series is convergent

from x= ___ to

x = ____

Attempt

[PLAIN]http://img412.imageshack.us/img412/7411/image00.jpg [Broken]

Attempted solutions:

I have to input the answer into something called WeBWorK and i've tried a bunch of different pairs of number, the only ones i remember try were

0, 8

0, 4

0, -8

among many others.

Can anyone tell me what I'm doing wrong?

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# Finding Intervals of Convergence

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