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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 (S_{20}=740) and (S_{10}=170). What is the value of (d)?

Answer and explanation

Correct answer: (4)

Solving the two sum equations gives (a=-2) and (d=4). Exam tip: find (a) and (d) together from two sums.

Related tags

Ap Find-D-From-Sums 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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