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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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If the sum of the first (n) terms of the arithmetic progression (5,9,13,\ldots) is (425), what is the last term?

Answer and explanation

Correct answer: (57)

Solving gives (n=13), so the last term is (5+12(4)=53). Exam tip: verify both the sum and the last term after finding (n).

Related tags

Ap Last-Term-From-Sum 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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