Which of the following are APs? If they form an AP, find the common difference d and write three more terms.

, , …..

For a series to be in AP, the common difference (d) should be

Equal.

d₁ = second term – first term = – = 0

d₂ = Third term - Second term = – = 0

Since common difference is same the above series is in AP.

The next three terms will be the 5^th, 6^th, 7^th.

5^th term will be given by = a + (5-1)d = a + 4d = + 4(0) =

6^th term is a + (6-1)d = a + 5d = + 5(0) =

7^th term is a + (7-1)d = a + 6d = + 6(0) = .