Use the ratio test to find the radius of the convergence of the power series. How do I start this? I need to find a common expression first?
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Originally Posted by VkL Use the ratio test to find the radius of the convergence of the power series. How do I start this? I need to find a common expression first? nth term is $\displaystyle \frac{(2n+1)x^n}{n}$ now use the ratio test, setting the limit to be less than 1
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