BC
Series
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Find the interval of convergence
\sum_{n=1}^{\infty} \frac{x^n}{n}
1Set up the ratio test
\left|\frac{a_{n+1}}{a_n}\right| = \left|\frac{x^{n+1}}{n+1} \cdot \frac{n}{x^n}\right| = |x| \cdot \frac{n}{n+1}
Showing step 1 of 5: Set up the ratio test.
Interval of Convergence Finder: Ratio Test and Endpoints from CalcLearn, free AP Calculus study tools.