Question

Commom difference of ap 199,97,94,91

Answer 1

Answer:

3,

Step-by-step explanation:

97-94=94-91=3

hence the common difference is 3

Answer 2

Answer:

d = -3

Step-by-step explanation:

The AP is

199, ..., 97, 94, 91

Common difference, d = a(n) - a(n - 1)

                                   d = 91 - 94 = -3

Also we can take an as 94 and a(n-1) as 97 because the common difference remains same in an AP.

d = a(n) - a(n1)

d = 94 - 97

d = -3