Question

Efetue:.....................................

Answer 1

Resposta:

Explicação passo a passo:

a) 6!-5!/5! + 0!

6!/5! - 5!/5! + 0!

6.5!/5! - 1 + 1

6 ✓

b) 10!+9!/11!

10!/11! + 9!/11!

10!/11.10! + 9!/11.10.9!

1/11 + 1/110

10/110 + 1/110

11/110

1/10 ✓

Answer 2

$\large \boxed{ \begin{array}{l} \rm \: a) \\ \\ \dfrac{6! - 5!}{5!} + 0! \\ \\ \dfrac{6 \times 5! - 5!}{5!} + 1 \\ \\ \dfrac{5 \times \cancel{5!}}{ \cancel{5!}} + 1 \\ \\ 5 + 1 \\ \\ \boxed{ 6}\end{array}}$

$\large \boxed{ \begin{array}{l} \rm \: b ) \\ \\ \dfrac{10! + 9!}{11!} \\ \\ \dfrac{10 \times 9! + 9!}{11 \times 10 \times 9!} \\ \\ \dfrac{ \cancel{11} \times 9!}{ \cancel{ 11} \times 10 \times 9!} \\ \\ \dfrac{9!}{10 \times 9!} \\ \\ \boxed{ \dfrac{1}{10} }\end{array}}$