Question

Aplicando a fórmula An,p= n! (n,p)!, Calcule: A) A6,4 B)A9,3 C)A5,5

Answer 1

Resposta:

A) A6,4= n! ÷ ( n - p )! --> 6! ÷ ( 6 - 4)! -->

6×5×4×3×2×1 = 2 × 1 --> 720 ÷ 2 = 360 .

B)A9,3 = n! ÷ ( n- p)! --> 9!÷ ( 9 - 3)! -->

9×8×7×6×5×4×3×2×1 ÷ 3×2×1= 60. 480

C) A5,5= 5! ÷ 0 = 120