ISI2016-MMA-22

Question

The infinite series $\Sigma_{n=1}^{\infty} \frac{a^n \log n}{n^2}$ converges if and only if

• A. $a \in [-1, 1)$
• B. $a \in (-1, 1]$
• C. $a \in [-1, 1]$
• D. $a \in (-\infty, \infty)$

Comments

$3$ options are same in the que?

Is it??