Question

What is the common difference for this arithmetic sequence? -6, -2, 2, 6, 10

a) 4
b) 3
c) 6
d) 5

Answer 1

a) 4.

Explanation:

Common difference = any term after the first - previous term

= -2 - (-6)

= -2 + 6

= 4

Checking other terms:-

2 - (-2) = 2+2 = 4

6 - 2 = 4 and 10 - 6 = 4 which confirms it is 4.

Answer 2

Answer:4

Explanation:

-6+4=-2

-2+4=2

2+4=6

6+4=10