SOLUTION: what is the series of arithmetic?

Question 130533: what is the series of arithmetic?
Answer by prabhjyot(165) (Show Source): You can put this solution on YOUR website!
A series such as 3 + 7 + 11 + 15 + �� + 99 or 10 + 20 + 30 + �� + 1000 which has a constant difference between terms. The first term is a1, the common difference is d, and the number of terms is n. The sum of an arithmetic series is found by multiplying the number of terms times the average of the first and last terms.

Formula: sum =
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