Question

Să se calculeze:
a) 3!;5!;8!; b) 10! supra 6!×2! c) 9!×4! supra 16!

Answer 1

a) 3! = 1 x 2 x 3 = 6
5! = 1 x 2 x 3 x 4 x 5 = 120
8! = 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 = 40320
b) 10! / 6! x 2! = 6! x 7 x 8 x 9 x 10/ 6! x 1 x 2 = 7 x 8 x 9 x 10 / 2 =7 x 8 x 9 x 5 = 2520
c) 9! x 4! / 16! = 9! x 4 ! / 9! x 10 x 11 x 12 x 13 x 14 x 15 x 16 = 1 x 2 x 3 x 4 / 10 x 11 x 12 x 13 x 14 x 15 x 16 = 24 / 57657600