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 $n$.
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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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