(i) a = 2, d = 2.5 (1 mark)
Sol. a = 2, d = 2.5
Here, t1 = a = 2
t2 = t1 + d = 2 + 2.5 = 4.5
t3 = t2 + d = 4.5 + 2.5 = 7
t4 = t3 + d = 7 + 2.5 = 9.5
t5 = t4 + d = 9.5 + 2.5 = 12
∴ The first five terms of the A.P. are 2, 4.5, 7, 9.5 and 12.
