Question

fatorial de 9! / 7! -6!

Answer 1

9*8*7*6*5*4*3*2*1/ 7**6*5*4*3*2*1- 6*5*4*3*2*1 =
362880/ 5040 - 720=
362880/ 4320=
84

Answer 2

9!/7!-6! = 9x8x7x6x5!/7x6x5! - 6x5! = 9x8x7x6x5!/(7x6 - 6) 5! [corte o 5!] -> 9x8x7x6/36 = {84}