(vi) 0.5, 2, 3.5, 5, ... (1 mark)
Sol. t1 = 0.5, t2 = 2, t3 = 3.5, t4 = 5
t2 – t1 = 2 – 0.5 = 1.5
t3 – t2 = 3.5 – 2 = 1.5
t4 – t3 = 5 – 3.5 = 1.5
Here, The difference between ANY two consecutive terms is 1.5 which is constant.
∴ The sequence is an A.P.
