Can anyone help me solve this?

My answer is 5.

My friend's got 17.

Im confused.

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- Apr 19th 2013, 06:13 PMweijing85Finding Interval of Convergence
Can anyone help me solve this?

My answer is 5.

My friend's got 17.

Im confused. - Apr 19th 2013, 07:10 PMGusbobRe: Finding Interval of Convergence
- Apr 20th 2013, 01:24 AMweijing85Re: Finding Interval of Convergence
thanks! ((: