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OpenStudy (anonymous):
Find an equation for the nth term of the arithmetic sequence.a16 = 21, a17 = -1 an = 351 + 22(n + 1) an = 351 - 22(n + 1) an = 351 + 22(n - 1) an = 351 - 22(n - 1)
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OpenStudy (blurbendy):
The last one works because if you put 16 in for n, you'll get 21, and if you put 17 in for n, you'll get -1
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