How do you find the sum of a sequence of numbers

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2015-11-17 11:17:10

Sum = total numbers * ( first number / 2 + last number/ 2 )

2015-11-17 11:18:25

By using Arithmetic Progressions S=n/2[2a+(n-1)d] n represents the numbers of terms a represents the first term d represents the common differences. I hope this can help you.

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