(Q17).Which of the following forms an AP? If they form an AP, then write the next two terms?

(i) – 2, 2, – 2, 2, – 2, . . .

a2 – a1 = – (– ) = + =

a3 – a2 = = – – = –

As a2 – a1 ≠ a3 – a2, the given list of numbers does not form an AP