Question

alternating series (-1)^(n)*(n/10^n) from n equals 1 to infinity. can someone show me the right way to find if it is convergent or divergent. thanks.

Answer 1

Did you try the divergency test?

Answer 2

Actually, it looks like the divergence test doesn't work here.

Answer 3

So, we need to try something else.

Answer 4

This might be a combo of the comparison test and the alternating series test.