The problem:Find the radius and interval of convergence.

The attempt:

I basically did the ratio test and it equaled 0. So does R = and I = ?

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- Nov 30th 2011, 06:28 PMIntrusionFinding radius and interval of convergence
**The problem:**Find the radius and interval of convergence.

**The attempt:**

I basically did the ratio test and it equaled 0. So does R = and I = ? - Nov 30th 2011, 07:20 PMchisigmaRe: Finding radius and interval of convergence
- Dec 1st 2011, 03:38 AMHallsofIvyRe: Finding radius and interval of convergence
chisigma's point is that, the way you wrote it here, that is NOT a power series. I expect that you meant

Yes, the limit of the ratios is 0 which is less than 1 for**all**x. The "radius of convergence" is infinite.