Which of the following series could be tested for convergence/divergence with the integral test?

Question

Which of the following series could be tested for convergence/divergence with the integral test?

1. 
2. 
3. 

A	I only
B	II only
C	II and III
D	I and II

Answer 1

(1/x!)dx has no integration strategy,

(1/x)dx is integrated to lnx and with limits given actually diverges

(ln(x)/x²) can be integrated (by parts) to (lnx-1)/x with limits converges.