Question

1) resolva as seguintes equacoes fatoriais
a) (x+2) ! / x!= 0



b) x!/ (x-1) ! / = 5!

Answer 1

(x+2) ! / x!= 0

(x+2)(x+1)x!/x! = 0

(x+2) (x+1)=0

x'=-2...x"=-1 ( não servem) ==> s:{ }

x!/ (x-1) ! / = 5!

x(x-1)!/(x-1)! =120

x =120 ✓