Mathematics 4024 · O Level · Sequences

Sequences — practice question

(a)[2]

A sequence has $n$th term $3n^2 - 1$. Find the first three terms of the sequence.

(b)[2]

A sequence has first five terms $1, 3, 9, 27, 81$. Find an expression, in terms of $n$, for the $n$th term of this sequence.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The three terms are $2,\,11,\,26$.” …