Question

The nth term of a sequence is 1 2 n + 4.

Write down the first five terms of this sequence.


………….. , ………….. , ………….. , ………….. , ………….. [2]

(b) Here is a sequence of numbers.
3, 10, 17, 24, 31, 38, ……….
Find an expression for the nth term of this sequence.

Answer 1

a) let n be 1

12(1)+4=16

let n be 2

12(2)+4=28

similarly let n be 3,4,5

their values are 40,52,64.

The first 5 terms in the sequence is 16,28,40,52,64

b)tn = a+(n-1)d