Question

find the sum of n term of series​

Answer 1

Answer:

The formula to find the sum of the first n terms of our sequence is n divided by 2 times the sum of twice the beginning term, a, and the product of d, the common difference, and n minus 1. The n stands for the number of terms we are adding together.

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Answer 2

Sn= n/2(2a1+(n-1)d)

Or

Sn=n/2(a1+an)

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