Which of the following is true for the series of summation from n=0 to infinity of(-1/x)^n

Question

a) For x=2, the series diverges
b) For x=-1/2 , the series converges
c) For x=1/2, the series converges
d) For x=3, the series converges

Answer 1

Sub in the values for x then change the n values from (0, 1, 2...) and see what happens to the answers : )

Answer 2

I got answer A with your help. Is that correct?