Question

Calcule o valor do fatorial:

1)(3!x7!)
9!
2) 2x + 20 = 6!

Answer 1

Resposta:

1)

$\frac{3! \times 7!}{9!} = \\ \\ \\ \frac{3 \times 2 \times 1 \times 7!}{9 \times 8 \times 7!} = \\ \\ \frac{6 }{9 \times 8} = \\ \\ \frac{6 \div 6}{72 \div 6} = \\ \\ \frac{1}{12}$

2)

2x + 20 = 6!

2x = 6×5×4×3×2×1 - 20

2x = 720 - 20

2x = 700

$x = \dfrac{700}{2} \\ \\ x = 350$

Bons Estudos!