Mathematics 0580 · IGCSE · Sequences

Sequences — practice question

(a)[2]

Find the $n$th term in the sequence $21, 13, 5, -3, -11, \dots$

(b)[2]

Find the $n$th term for the sequence $2.5, 5, 10, 20, 40, \dots$

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Final answer: $29-8n$” …

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