Question

caucular os arranjos simples.

A- A9,2 =
B- A6,3 =
C- A8,4 =

Answer 1

A=
C⁹₂= 9! / 2! = 9.8.7.6.5.4.3.2! / 2! = 181440
C⁶₃ = 6! / 3! = 6*5*4*3! / 3! = 120
C⁸₄= 8! / 4! = 8*7*6*5*4! / 4! = 1680