Resposta:
3024 SENHAS
Explicação passo-a-passo:
[tex]\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } \: \: \mathsf {OI, TUDO \: \: J\acute{O}IA \: ? \: \:\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } }[/tex]
[tex] \sf{ s_{ \: 9:4} = \frac{9!}{(9 - 4)!} } \\ \\ \sf{ s_{ \: 9:4} = \frac{9 \times 8 \times 7 \times 6 \times 5!}{(9 - 4)!} } \\ \\ \sf{ s_{ \: 9:4} = \frac{9 \times 8 \times 7 \times 6 \times 5!}{5!} } \\ \\ \sf{ s_{ \: 9:4} = \frac{9 \times 8 \times 7 \times 6 \times \cancel{\blue {5!}}}{\cancel{\blue {5!}}} } \\ \\ \sf{ s_{ \: 9:4} = 9 \times 8 \times 7 \times 6 } \\ \\ \sf{ s_{ \: 9:4} = 72 \times 7 \times 6} \\ \\ \sf{ s_{ \: 9:4} = 504 \times 6 } \\ \\ \boxed{\red{ \sf{ s_{ \: 9:4} = 3024}}}[/tex]
[tex]\mathcal{ATT : ARMANDO} \\ \mathfrak{\small04\diagup01\diagup2021} \\ \mathfrak{\small{2} :{42} \: \: pm}[/tex]
