Question

is 6,10,14,18------------an A.P or not? Justify.​

Answer 1

Answer:

10-6=4

14-10=4

18-14=4

Common difference is same in

all cases.

Therefore, it is in AP

Answer 2

Answer:

6, 10, 14, 18, .....

a1, a2, a3, a4, .....

[if the above sequence is an AP, the a2 - a1 = a3 - a2]

a2 - a1 = a3 - a2

10 - 6 = 18 - 14

4 = 4

LHS = RHS

The above sequence is an AP.

Hope it helps...