Matematică
Mixa
2015-11-04 22:44:18
Calculati:a)5!+4!/3!+6! b)9!•5!/7!•6! c)n!/(n+1)! d)(n-1)!+(n+1!)/n!+(n+1)!
Răspunsuri la întrebare
zimaanamaria
2015-11-04 23:05:43

a)5!+4!/3!+6!= 5!+3!*4/3!+6!= 5!+4+6!=844 b)9!•5!/7!•6!= 9!•5!/(5!*6*7)•6!= 9!*6!/42= 6220800 c)n!/(n+1)!= n!/n!(n+1)=1/(n+1) d)(n-1)!+(n+1!)/n!+(n+1)!= (n-1)!+n!(n+1)/n!+(n+1)!= (n-1)!+n+1+(n+1)!

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