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sarah12345
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#1
write n(n^2 -1) in terms of factorials?????????????????????? ?????????????
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C4>O7
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= n(n+1)(n-1)
= (n+1)!/(n-2)!
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sarah12345
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(Original post by C4>O7)
= n(n+1)(n-1)
= (n+1)!/(n-2)!
thank you
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