SOLUTION: Find the sum of the arithmetic series where a[1]=7, n=31, and a[n]=127

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Question 460585: Find the sum of the arithmetic series where a[1]=7, n=31, and a[n]=127
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
S=n/2(a[1]+a[n])
=31/2(7+127)
=31/2 * 134
=31*67
=2,077
.
Ed