A16: Which of the following three series converge ? ( ) E n2 + n n2 - 2n+1 n=1 n+ 3 n=2 A: only (i) converges B: only (i) and (ii) converge C: only (ii) and (iii) converge D' all three converge E: none of them converge A17: Which statement most accurately describes the series (-1)"tlen A: converges conditionally B: converges absolutely C: diverges D: is alternating and converges conditionally E: is alternating and converges absolutely