Question

Fatorial : Calcule D) 5!-4! E) 10!/4!7!

Answer 1

5! - 4!  = 5 x 4! - 4! = 4! . (5 - 1) = 4! . 4 = 4x3x2x1 x 4 = 96
10! / 4!7! = 10x9x8x7! / 4!7! = 10x9x8/4! = 10x9x8 / 4x3x2x1 = 5x3x2 = 30