Question

Find the missing terms.
3, _____, _____, 21 (arithmetic)

Answer 1

the common difference is 6. So, the missing two terms are 9 and 15 using

3 + (n-1)(6)

Answer 2

Hello There!!

Explanation:

The answer is 3,9,15,21.

hope this helps,have a great day!!

~Pinky~