- $\rhd$ Power series (6:49) Introduction to power series.
- $\rhd$ Worked example: interval of convergence (8:25) Find the interval of convergence for which the series $\displaystyle\sum_{n=1}^{\infty}\dfrac{x^n}{n5^n}$ converges.
- * Practice: Find the interval of convergence. (4 problems)
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