Question

Alguem me ajuda nessas questões?

a) 8!/7! =
b) 11!/12! =
c) 9.10!/9!8=

Answer 1

A) 8!/7! = 8

b) 11!/12! = 1/12

c)( 10!×9)/(9!×8) = 90/8 = 11.25