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    ծȯĿǻͶ棬ͶʾѡծȯеıȻ衣ծȯƱʲּͬͶʵķ

1ΪծȯծȯͶָһʱڹծȯͶʶıʡһͶгԼ۸PijһֵΪMr()ΪN(뵽ڵʱ)ΪnҵһγϢļȷծȯʱÿһλծȯ˵ΪM(1rN)ڵͶΪPΪM(1rN)PΪM(1rN)P/Pծȯ뵽ڵʱ仹n꣬ƽͶRļ㹫ʽΪ

RM(1rN)P/Pn(1)
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ǷڸϢծȯʱֻдڵϢ룬Ͷʵļ㹫ʽΪ
RM(1rn)P/Pn

2ۼ۷еծȯЩծȯƱϲʣծȯʱƱֵһγϢծȯDzȡۼ۵ķУʵļ㹫ʽΪ
R(MP)/Pn(2)

繺Ǽȷծȯʵļ㹫ʽΪ
R(MP)/Pn

3ΪծȯͶԼ۸PΪrֵΪMΪNΪnծȯʱծȯΪM(1r)
NPڵͶΪPͶR()ļ㹫ʽΪ

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