Exercício de contagem.
Grata.
Anexos:
Soluções para a tarefa
Respondido por
1
Oi Mari
a) 7!/4! = 7*6*5*4!/4! = 7*6*5 = 210
b) 3!*7!/4!6!
3!/4! = 1/4, 7!/6! = 7
3!*7!/4!6! = 7/4
a) 7!/4! = 7*6*5*4!/4! = 7*6*5 = 210
b) 3!*7!/4!6!
3!/4! = 1/4, 7!/6! = 7
3!*7!/4!6! = 7/4
Marii67:
oii, muito obrigado :)
esses * significam um sinal de multiplicação.
??
Respondido por
1
Boa tarde Mari!
Solução!
![A= \dfrac{7!}{4!}\\\\\\\
A= \dfrac{7\times6\times5\times4!}{4!}\\\\\\\
A=7\times6\times5\\\\\\\
\boxed{A=210}](https://tex.z-dn.net/?f=A%3D+%5Cdfrac%7B7%21%7D%7B4%21%7D%5C%5C%5C%5C%5C%5C%5C%0AA%3D+%5Cdfrac%7B7%5Ctimes6%5Ctimes5%5Ctimes4%21%7D%7B4%21%7D%5C%5C%5C%5C%5C%5C%5C%0AA%3D7%5Ctimes6%5Ctimes5%5C%5C%5C%5C%5C%5C%5C%0A%5Cboxed%7BA%3D210%7D "A= \dfrac{7!}{4!}\\\\\\\
A= \dfrac{7\times6\times5\times4!}{4!}\\\\\\\
A=7\times6\times5\\\\\\\
\boxed{A=210}")
![B= \dfrac{3! \times 7!}{4! \times 6!}\\\\\\\
B= \dfrac{3! \times 7\times6!}{4! \times3! 6!}\\\\\\\
B=\dfrac{3! \times 7\times6!}{4\times3! \times 6!}\\\\\\\
\boxed{B= \dfrac{7}{4}}](https://tex.z-dn.net/?f=B%3D+%5Cdfrac%7B3%21+%5Ctimes+7%21%7D%7B4%21+%5Ctimes+6%21%7D%5C%5C%5C%5C%5C%5C%5C%0AB%3D+%5Cdfrac%7B3%21+%5Ctimes+7%5Ctimes6%21%7D%7B4%21+%5Ctimes3%21+6%21%7D%5C%5C%5C%5C%5C%5C%5C%0AB%3D%5Cdfrac%7B3%21+%5Ctimes+7%5Ctimes6%21%7D%7B4%5Ctimes3%21+%5Ctimes+6%21%7D%5C%5C%5C%5C%5C%5C%5C%0A%5Cboxed%7BB%3D+%5Cdfrac%7B7%7D%7B4%7D%7D+ "B= \dfrac{3! \times 7!}{4! \times 6!}\\\\\\\
B= \dfrac{3! \times 7\times6!}{4! \times3! 6!}\\\\\\\
B=\dfrac{3! \times 7\times6!}{4\times3! \times 6!}\\\\\\\
\boxed{B= \dfrac{7}{4}}")
Boa tarde!
Bons estudos!
Solução!
Boa tarde!
Bons estudos!
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