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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 (17) terms of the arithmetic progression (40,35,30,\ldots)?

Answer and explanation

Correct answer: (0)

The seventeenth term is (-40), so (S_{17}=\frac{17}{2}(40-40)=0). With opposite equal end terms, the sum can be zero.

Related tags

Decreasing Ap Zero Sum Ap Sum 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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