Find the sum of the arithmetic series for which a_1 = 7, n = 31, and a_n = 127.

asked Nov 14, 2021 175k views

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Answer: 2077

There are 31 terms.

S₃₁ = 31(a₁+a₃₁)/2 = 31(7+127)/2 = 2077

Stanleyrr answered Nov 18, 2021

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