(iii) 1, 4, 7, 10, .... (1 mark)
Sol. t1 = 1, t2 = 4, t3 = 7, t4 = 10
t2 – t1 = 4 – 1 = 3
t3 – t2 = 7 – 4 = 3
t4 – t3 = 10 – 7 = 3
Here, The difference between ANY two consecutive terms 3 which is constant.
∴ The sequence is an A.P.
