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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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If the (n)th term of an arithmetic progression is (a_n=2n+1), what is the sum of the first (6) terms?

Answer and explanation

Correct answer: (48)

The first (6) terms are (3,5,7,9,11,13), whose sum is (48). When (a_n) is given, find the first and last terms.

Related tags

Nth Term Ap Sum Sequence 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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