Question

Which one is an A. P. series ?
(A) 1, 2, 4, 8,
(B) 5, 8, 12, 15, ..
(C) 3, 6, 9, 12, ......
(D) None of these​

Answer 1

Answer:

c)3,6,9

Step-by-step explanation:

because the common difference