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

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What is the sum of the first (40) positive even numbers?

Answer and explanation

Correct answer: (1640)

The sum of the first (n) even numbers is (n(n+1)), so (40\times41=1640). Remember it for even-number AP questions.

Related tags

Even Numbers Ap Sum Class 10 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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