(iv) 3, 6, 12, 24, .... (1 mark)
Sol. t1 = 3, t2 = 6, t3 = 12, t4 = 24
t2 – t1 = 6 – 3 = 3
t3 – t2 = 12 – 6 = 6
t4 – t3 = 24 – 12 = 12
Here, The difference between ANY two consecutive terms is not constant.
∴ The sequence is not an A.P.
