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OpenStudy (anonymous):
how would I do this problem? Find the first term in the sequence defined by an=-2(n2+2n). (Hint: To find the nth term in this sequence, replace n in the formula with the number of the term you wish to calculate)
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OpenStudy (stormfire1):
The hint tells you everything you need to know. To find the first term, plug in n=1: -2((1*2)+(2*1))=-8
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