If y>x then y! / x! =?

Y(y-1)(y-2)…….(x+1)

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kaka

  • Jun 10th, 2006
 

y * (y-1) * (y-2)........ upto (y-x) terms

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Jinho Hwang

  • Oct 28th, 2006
 

y(y-1)(y-2)..(x+1)x(x-1)..1 / x(x-1)(x-2)..1

= y(y-1)(y-2)..(x+1)

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