表达式4: left parenthesis, "n" , "a" left parenthesis, "n" , right parenthesis , right parenthesisn,an
4
表达式5: "n" equals left bracket, 1 , ... , "N" , right bracketn=1,...,N
5
表达式6: "b" left parenthesis, "x" , right parenthesis equals StartFraction, 1 Over ln left parenthesis, "x" , right parenthesis , EndFractionbx=1lnx
6
表达式7: left parenthesis, "n" , "b" left parenthesis, "n" , right parenthesis , right parenthesisn,bn
7
表达式8: "c" left parenthesis, "x" , right parenthesis equals StartFraction, cos left parenthesis, "x" , right parenthesis Over ln "x" , EndFractioncx=cosxlnx
