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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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What will be the sum of the first (11) terms of the arithmetic progression (1,4,7,\ldots)?

Answer and explanation

Correct answer: (176)

Here (a=1), (d=3), and (n=11), so (S_{11}=176). For an odd number of terms, you can also check using the middle term.

Related tags

Ap Sum Eleven Terms 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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