Expression 3: "Y" left parenthesis, "n" , right parenthesis equals left parenthesis, 1 minus StartFraction, "l" Over "n" , EndFraction , right parenthesis Superscript, "n" , BaselineYn=1−lnn
3
Expression 4: "Y" left parenthesis, "n" , right parenthesis equals left parenthesis, 1 minus StartFraction, "l" Over "n" , EndFraction , right parenthesis Superscript, negative "k" , BaselineYn=1−ln−k
4
Expression 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 parenthesisYn=n!n−k!nk