Question

Criterio
calcule:
a) 4!/3!
b) 10!/8!
c) 5!/3!2!
d) A8,6
e) A12,3

Answer 1

Resposta:

Explicação passo-a-passo:

4!/3!=

4.3!/3!= (corta os 3!)

4

10!/8!=

10.9.8!/8!= (corta os 8!)

10.9=

90

5!/3!2!=

5.4.3!/3!2!= (corta os 3!)

5.4/2!=

5.4/4=   (corta os 4)

5

An,p= n!/(n-p)!

A8,6=

8!/(8-6)!=

8!/2!=

8.7.6.5.4.3.2!/2!=  (corta os 2!)

8.7.6.5.4.3=

20160

A12,3=

12!/(12-3)!=

12!/9!=

12.11.10.9!/9!=  (corta os 9)

12.11.10=

1320