Mathematics 4024 · O Level · Sequences

Sequences — practice question

Each term in the sequence is $4$ greater than the one immediately before it. The third term is $17$, and the fourth term is $21$.

(a)[1]

Find the initial term.

(b)[2]

Find a formula for the $n$th term of this sequence. Give your answer in its simplest form.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The required value is $9$.” …