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OpenStudy (anonymous):

can anyone help me with radius of convergence question? question in the comments

OpenStudy (anonymous):

OpenStudy (anonymous):

It is convergent 10abs(x-9) < 1, thus abs(x-9) < 0.1. so radius is 0.1 and it converges in the interval of (8.1, 91) right? but it is wrong. what is wrong with my answer?

OpenStudy (anonymous):

sorry for typo (8.1, 9.1) was my answer

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