Mathematics 9709 · AS & A Level · Series

Series — practice question

In an arithmetic progression, the 9th term has value $22$, while the sum of the first $4$ terms is $49$. The $n$th term of the progression is $46$.
(i)[4]

Determine the first term and the common difference of the progression.

(ii)[2]

Determine the value of $n$.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: Sets up equation $a + 8d = 22$

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