(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.