Question

Simplificar as frações: a) 9! / 7! e b) 7! / 4! *

Answer 1

a-) 9!/7! = 9 x 8 x 7! / 7! x 2!

9 x 8/ 2 x 1

72/2 = 36

b-) 7!/4! = 7x6x5x4!/ 4! x 3!

7x6x5/3x2x1

= 210/6

= 35