1. For each sequence, find the next four terms.
(i) 1, 2, 4, 7, 11, ..... (1 mark)
Sol. t1 = 1 + 0 = 1
t2 = 1 + 1 = 2
t3 = 2 + 2 = 4
t4 = 4 + 3 = 7
t5 = 7 + 4 = 11
t6 = 11 + 5 = 16
t7 = 16 + 6 = 22
t8 = 22 + 7 = 29
t9 = 29 + 8 = 37
∴ The next four terms of the sequence are 16, 22, 29 and 37.