Question

What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18, ...?

a. -1 c. 3 b. -3 d. 30

Answer 1

b

Explanation:

edge2021

Answer 2

b. -3

Explanation:

The common difference in an arithmetic sequence:

`d=a_(n+1)-a_n`

27 - 30 = -3

24 - 27 = -3

21 - 24 = -3

18 - 21 = -3

CORRECT :)

It's constant.