Question

Alguém me ajuda?? Resolva as equações: A) (x+2)=!40.320
B) (n-1)!=120
C)(n+5)!=720
D)n!\(n-2)!=42
E)(x-1)!\(x-3)!=12
F)(2n)!\(2n-2)!=12?

Answer 1

(x+2)!=40320 => (x+2)!=8! => x=8-2=6

(n-1)!=120 => (n-1)!=5! => n=5+1=6

(n+5)!=720=> (n+5)!=6! => n=6-5= 1