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

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If (S_6=72) and (S_{12}=252), what is the sum of the (7)th to (12)th terms?

Answer and explanation

Correct answer: (180)

The sum of the (7)th to (12)th terms is (S_{12}-S_6=180). Subtract partial sums to find the sum of middle terms.

Related tags

Partial Sum Ap Sum Subtraction 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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