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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, (S_{18}=1179) and (S_{36}=4626). Find the value of (S_{54}).

Answer and explanation

Correct answer: (10341)

The given sums give (a=6) and (d=7), so (S_{54}=10341). From two partial sums, determine the AP first.

Related tags

Two Partial Sums Find Later Sum 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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