3, 5, 7, 9, 11, ..... (1 mark)

(ii) 3, 5, 7, 9, 11, ..... (1 mark)

Sol. t₁ = 3, t2 = 5, t3 = 7, t4 = 9, t5 = 11

t₂ – t₁ = 5 – 3 = 2

t₃ – t₂ = 7 – 5 = 2

t₄ – t₃ = 9 – 7 = 2

t₅ – t₄ = 11 – 9 = 2

Here, The difference between ANY two consecutive terms is 2 which is constant.

∴ The sequence is an A.P.