Question

numeros Binomiais:

a) 5 ! sobre 2 !
b) 2! sobre -3 !
c)4!
d) n! sobre (n+2) !

Answer 1

A) 5.4.3.2!/2! =5.4.3=60

Answer 2

$a)\ \frac{5!}{2!}= \frac{5.4.3.2!}{2!}=5.4.3=60 \\ \\ b)\ \frac{2!}{-3!} = \frac{2!}{-3.2!}=-\frac{1}{3} \\ \\ c)\ 4.3.2.1=24 \\ \\ d)\ \frac{n!}{(n+2)!}= \frac{n!}{(n+2).(n+1).n!}=\frac{1}{(n+2).(n+1)}=\frac{1}{n^2+3n+2}$