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03-04-2017
Mathematics

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what is the 7th term of the sequence whose 9th term is (n + 1)(n - 2)

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Аноним Аноним

03-04-2017

tn = n(n + 2) Just substitute 7 for n and simplify t7 = 7(7 + 2) = 7(9) = 63

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