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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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The first term of an arithmetic progression is (96) and the sum of the first (25) terms is (0). What is the common difference?

Answer and explanation

Correct answer: ( -8 )

From (0=\frac{25}{2}[192+24d]), (d=-8). Exam tip: in zero-sum questions, set the bracket equal to zero.

Related tags

Ap Zero-Sum 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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