Question

Check whether 1,3,9,7……. is an AP .Explain.

Answer 1

Answer:

d1 = 3-1 = 2

d2 = 9-3 = 6

As d1 ≠ d2, it is not an AP

Answer 2

Answer:

d1 = 3-1 =2

D2=9-3=6

as d1 D2 it is not an ap