For which of the following series is the th-term test inconclusive

MATHEMATICS · Single correct · AP · Calculus BC · Infinite Sequences and Series · Infinite Sequences and Series

Problem

For which of the following series is the

n

th-term test inconclusive, so that another convergence test is required? (a)

\displaystyle\sum_{n=1}^{\infty}\frac{3n}{n+2}

(b)

\displaystyle\sum_{n=2}^{\infty}\frac{1}{n(\ln n)^{2}}

(c)

\displaystyle\sum_{n=1}^{\infty}\frac{(-1)^{n}(n+5)}{n}

(d)

\displaystyle\sum_{n=1}^{\infty}\frac{\ln n}{\ln(n+1)}