Question

resolva a equação:Ax,3=4 Ax,2

Answer 1

Boa tarde!

Aₓ,₃ = 4 Aₓ,₂

x! / (x-3)! = x! / (x-2)!

1 / (x-3)! = 1 / (x-2)(x-3)!

x - 2 = 1

∴ x = 3

Answer 2

X!/(X-3) = 4X X!/(X-2)
X!(X-2)-4X  X!(X-3)!
(X-2) X(X-3)!= 4(X-3)!
(X-2)=4(X-3)!/(X-3)!
X-2=4 X 1
X= 4+2
X=6