Ответ:
[tex]6\frac{1}{3}[/tex]
Объяснение:
[tex]\displaystyle \frac{\mathcal{A}^2_{17}-\mathcal{C}^3_{10}}{P_4} =\frac{\dfrac{17}{(17-2)!} - \dfrac{10!}{(10-3)!3! } }{4!} =\frac{\dfrac{17!}{15!}-\dfrac{10!}{7!3!} }{4!} =\frac{16*17-\dfrac{8*9*10}{2*3} }{4!} =\frac{16*17-4*3*10}{2*3*4} =\frac{4(4*17-3*10)}{2*3*4} =\frac{2*17-3*5}{3} =\frac{19}{3} =\boxed{\Large 6 \frac{1}{3} }[/tex]
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Answers & Comments
Ответ:
[tex]6\frac{1}{3}[/tex]
Объяснение:
[tex]\displaystyle \frac{\mathcal{A}^2_{17}-\mathcal{C}^3_{10}}{P_4} =\frac{\dfrac{17}{(17-2)!} - \dfrac{10!}{(10-3)!3! } }{4!} =\frac{\dfrac{17!}{15!}-\dfrac{10!}{7!3!} }{4!} =\frac{16*17-\dfrac{8*9*10}{2*3} }{4!} =\frac{16*17-4*3*10}{2*3*4} =\frac{4(4*17-3*10)}{2*3*4} =\frac{2*17-3*5}{3} =\frac{19}{3} =\boxed{\Large 6 \frac{1}{3} }[/tex]