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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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The sum of the first (n) positive even numbers is (650). What is (n)?

Answer and explanation

Correct answer: (25)

The sum of the first (n) even numbers is (n(n+1)), so (n=25). Exam tip: you can also treat it as the AP (2,4,6,\ldots).

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Ap Even-Numbers 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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