zapisz w jak najprostszej postaci wyrażenie :
a)5!(n+1)!/15(n-1)!n
b)(n+3)!/(n+2)!(n-1)
c)(n+2)!*(n+3)/(n+4)!
d)(n+3)!(n+5)!/(n+2)!(n+6)!
e)(n-2)!*(n-1)*n/n!*(n+1)
f) (n-3)!(n-2)(n-1)/n!(n+2)
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