Suppose that ∣an+1an∣→1\displaystyle {\left|\frac{{a}_{{{n}+{1}}}}{{a}_{{n}}}\right|}\to{1}∣∣anan+1∣∣→1 as n→∞\displaystyle {n}\to\inftyn→∞. Find the radius of convergence. ∑n=1∞anxn6n\displaystyle {\sum_{{{n}={1}}}^{{\infty}}}\frac{{{a}_{{n}}{x}^{{n}}}}{{6}^{{n}}}n=1∑∞6nanxn
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