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Class 10 Mathematics Arithmetic Progressions (AP)Finding the sum of the first $n$ terms of an APExpert

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In an arithmetic progression (t_9=36). What is the sum of the first (17) terms?

Answer and explanation

Correct answer: (612)

In (17) terms, the (9)th term is the middle term, so the sum is (17(36)=612). Exam tip: use the middle term for an odd number of AP terms.

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Ap Odd-Number-Terms Expert Finding The Sum Of The First $N$ Terms Of An Ap Finding The Sum Of The First N Terms Of An Ap Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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