Which of these series converges by the Dirichlet's Test?
∑(−1)nn2\sum \frac{(-1)^n}{n^2}∑n2(−1)n
∑sin(n)n\sum \frac{\sin(n)}{n}∑nsin(n)
∑1n\sum \frac{1}{n}∑n1
∑(−1)n\sum (-1)^n∑(−1)n