Get answer: For the following exercises, use the formula for the sum of the first n
Chapter 9, Problem 35(choose chapter or problem)
For the following exercises, use the formula for the sum of the first n terms of an arithmetic series to find the sum. 6 + 15 ___ 2 + 9 + 21 ___ 2 + 12 + 27 ___ 2 + 15
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