Which of the following forms an arithmetic progression?
A
1, 1, 2, 2, 3, 3, ...
B
0.3, 0.33, 0.333, ...
C
1/2, 1/4, 1/8, ...
D
√4, √16, √36, ...
Correct Option:
D
Explanation
An arithmetic progression has a constant difference between consecutive terms. Here, √4 = 2, √16 = 4 and √36 = 6, producing the sequence 2, 4, 6, ... with common difference 2. The other sequences do not have a constant difference.
