Which of the following series is NOT absolutely convergent? $\sum_{n=1}^\infty \frac{(-1)^{n-1}}{n!}$ $\sum_{n=1}^\infty \frac{(-1)^{n-1}}{n^4}$ $\sum_{n=0}^\infty \frac{(-1)^n}{n^4 + 1}$ $\sum_{n=2}^\infty \frac{(-1)^n}{\ln n}$ $\sum_{n=1}^\infty \frac{\sin n}{n^4}$
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A series is said to be absolutely convergent if the series formed by taking the absolute value of each term converges. Show more…
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