(ii) 3, 5, 7, 9, 11, ..... (1 mark)
Sol. t1 = 3, t2 = 5, t3 = 7, t4 = 9, t5 = 11
t2 – t1 = 5 – 3 = 2
t3 – t2 = 7 – 5 = 2
t4 – t3 = 9 – 7 = 2
t5 – t4 = 11 – 9 = 2
Here, The difference between ANY two consecutive terms is 2 which is constant.
∴ The sequence is an A.P.
