表达式3: "Y" left parenthesis, "n" , right parenthesis equals left parenthesis, 1 minus StartFraction, "l" Over "n" , EndFraction , right parenthesis Superscript, "n" , Baseline 有图表。 要进行音频跟踪,按“Alt 键 + T”。Yn=1−lnn
3
表达式4: "Y" left parenthesis, "n" , right parenthesis equals left parenthesis, 1 minus StartFraction, "l" Over "n" , EndFraction , right parenthesis Superscript, negative "k" , Baseline 有图表。 要进行音频跟踪,按“Alt 键 + T”。Yn=1−ln−k
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表达式5: "Y" left parenthesis, "n" , right parenthesis equals left parenthesis, StartFraction, "n" ! Over left parenthesis, "n" minus "k" , right parenthesis ! "n" Superscript, "k" , Baseline , EndFraction , right parenthesis 有图表。 要进行音频跟踪,按“Alt 键 + T”。Yn=n!n−k!nk