Question

如果z₁=2a+(a+1)i(a∈R)且│z₁│≤2又z₂=5ai，则│z₂│的取值范围是区间

1. A.
   (3，5)
2. B.
   [3，5]
3. C.
   [ 0，5 ]
4. D.
   [0，3]

Answer 1

C