運算式 2: "y" equals StartFraction, log Subscript, "e" , Baseline left parenthesis, "x" , right parenthesis Over "x" , EndFractiony=logexx
2
運算式 3: left parenthesis, "y" minus StartFraction, log Subscript, "e" , Baseline left parenthesis, "a" , right parenthesis Over "a" , EndFraction , right parenthesis left parenthesis, "y" minus "a" , right parenthesis plus "x" minus "x" equals 0y−logeaay−a+x−x=0
