Answer
Divergent
Work Step by Step
Given $$ \sum_{k=1}^{\infty} \left(\frac{-3}{2}\right)^{k+1}$$
This is a geometric series with $|r|=\frac{3}{2}>1$ , so $\displaystyle \sum_{k=1}^{\infty} \left(\frac{-3}{2}\right)^{k+1}$ is a divergent series