Question

Which of the sequences is an arithmetic sequence?

A. -2, 6, -10, 14, -18
B. 1, 6, 12, 18, 14
C. -48, -24, -12, -6, -3
D. -2, -8, -14, -20, -26

Answer 1

D, it decreases by 6 every time while the others are multiplied by number

Answer 2

Option D is the correct answer.

Explanation:

Arithmetic progression is the progression where the difference between (n+1) th term and n th is same for all n values.

Checking all the options.

Option A:

6 - (-2) = 8

-10 - 6 = -16

Option A is wrong.

Option B:

6 - 1 = 5

12 - 6 = 6

Option B is wrong.

Option C:

-24 - (-48) = 24

-12 - (-24) = 12

Option C is wrong.

Option D:

-8 - (-2) = -6

-14 - (-8) = -6

Option D is correct.