(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose that the following series converges when x = -4 and diverges when x = 6.

∑{n=0 -> ∞} c_n • x^n

What is the interval of convergence?

3. The attempt at a solution

I think it is [-5,5) but my friend reckons that it is [-5,6). I don't think [-5,6) is correct because this interval would tell us that 5 is a point of convergence but we don't know that... Am I right?

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# Homework Help: Radius of convergence question

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