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Mathematics 7 Online
OpenStudy (anonymous):

(n + 2) ! ------ n!

OpenStudy (anonymous):

question??

OpenStudy (anonymous):

\[(n+2)(n+1)\]

OpenStudy (anonymous):

\[\frac{(n+2)!}{n!}=\frac{(n+2)(n+1)n!}{n!}\] is why

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