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(ix) 2, 4, 8, 16, ..... (1 mark)

(ix) 2, 4, 8, 16, ..... (1 mark)
Sol. t1 = 21 = 2
t2 = 22 = 4
t3 = 23 = 8
t4 = 24 = 16
t5 = 25 = 32
t6 = 26 = 64
t7 = 27 = 128
t8 = 28 = 256

 The next four terms of the sequence are 32, 64, 128 and 256.