i have obtained the series for In(1+x) how can i find the radius of convergence? i have tried the ratio test but this doesn't seem to work for [(-1)^k* x^(k+1)]/k+1
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Let us look on (*)
Using Cauchy test, (*) converges if
Now, check what happens when x=1 and x=-1.
Last edited by Also sprach Zarathustra; March 19th 2011 at 11:17 PM.
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