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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 AP, (a=\frac{7}{2}), (d=\frac{5}{2}), and (n=40). Find the sum of the first (40) terms.

Answer and explanation

Correct answer: (2090)

Using (S_n=\frac{n}{2}[2a+(n-1)d]), the sum is (2090). In fraction-based questions, simplify the bracket first.

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Ap Sum Fraction 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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