infinite algebra 2 solving arithmetic sequences

infinite algebra 2 solving arithmetic sequences

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Is it asking for the sum of the arithmetic sequence at 34? Or the value of the 34th term? Value: plug 34 in for n: -11 + 7(34) = 227 Sum for arithmetic: Sum at nth term = [2(a1) + d(n-1)](n/2) where n = 34 a1 = plug in 1 for n = -11 + 7(1) = -4 d = the difference between the numbers = 7 a1 = -4, a2 = -11 + 7(2) = 3 --- 3 - (-4) = 7 [2(-4) + 7(34-1)](34/2) = 3791