n=1 (n^(k-1) / n^k + C ) Use the integral test to determine if the series is convergent.

This was the exact wording of the question that I need to solve. C and k are both positive and I am also not sure what my teacher wants me to do. But I have one guess that you are supposed to test if the f(x) of the formula is positive, continuous, or decreasing (?) Please try your best to solve this question.