8. If ∑an is a converging series with an for any n∈N , then
.
(A)O
(B)X
答案:登入後查看
統計: A(0), B(1), C(0), D(0), E(0) #2348343
統計: A(0), B(1), C(0), D(0), E(0) #2348343