Which of the following series can we apply the integral test to?
∑n=1∞(−1)nn\sum_{n=1}^{\infty} \frac{(-1)^n}{n}∑n=1∞n(−1)n
∑n=1∞n!\sum_{n=1}^{\infty} n!∑n=1∞n!
∑n=2∞1nlnn\sum_{n=2}^{\infty} \frac{1}{n \ln n}∑n=2∞nlnn1
∑n=1∞cos(nπ)\sum_{n=1}^{\infty} \cos(n\pi)∑n=1∞cos(nπ)