Question

ME AJUDEEEEEM PFV PRECISO MUITO DAS RESPOSTAS ❤️​

Answer 1

Fatorial, resolver as expressões

7.

$\sf = \dfrac{7!}{4!}$

$\sf = \dfrac{7\cdot6\cdot5\cdot4!}{4!}$

$\sf = \dfrac{7\cdot6\cdot5\cdot \backslash \!\!\! 4!}{\backslash \!\!\! 4!}$

$\sf = 7\cdot6\cdot5$

$\sf = 210$

Letra (C)

8.

$\sf x = \dfrac{3!}{4!}$

$\sf x = \dfrac{3!}{4\cdot3!}$

$\sf x = \dfrac{\backslash \!\!\! 3!}{4\cdot \backslash \!\!\! 3!}$

$\sf x = \dfrac{1}{4}$

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