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OpenStudy (anonymous):
can someone explain the following:
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OpenStudy (anonymous):
\[(n+4)!\div4n! + (n+4)!\div(n+1)! = (n+1)(n+4)!+4(n+4)!\div4(n+1)!\]
OpenStudy (precal):
do you know what a factorial is? ie 3! is 3*2*1 I think (n+4)! is (n+4)(n+3)(n+2)(n+1)n
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