решите, пожалуйста, 2 задание во вложении_))
24!/4!*20!=(1*2*3*4*5*6*7*8*9*,,,,*24)/(1*2*3*4*1*2*3,,,20)=(5*6*7*8,,,*24)/(1*2*3*4*5*6,,,*20)=
(21*22*23*24)/(1*2*3*4)=10626
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24!/4!*20!=(1*2*3*4*5*6*7*8*9*,,,,*24)/(1*2*3*4*1*2*3,,,20)=(5*6*7*8,,,*24)/(1*2*3*4*5*6,,,*20)=
(21*22*23*24)/(1*2*3*4)=10626