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Calculate the smallest possible value of $n$.
Mathematics 9709 · AS & A Level · Series
Series — practice question
An arithmetic progression starts with first term $-12$ and has common difference $6$. The total of the first $n$ terms is greater than $3000$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applies the correct formula $\frac{1}{2}n[-24+(n-1)6] \approx 3000$” …
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