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

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In an AP, (S_{10}=265) and (S_{20}=1030). Find the value of (S_{30}).

Answer and explanation

Correct answer: (2295)

The given sums give (a=4) and (d=5), so (S_{30}=2295). First determine the AP from the two partial sums.

Related tags

Two Sums Find S30 Ap 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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