表达式8: "m" Subscript, 1 , Baseline equals "f" prime left parenthesis, "a" , right parenthesism1=f′a
8
表达式9: "m" Subscript, 2 , Baseline equals "g" prime left parenthesis, "a" , right parenthesism2=g′a
9
表达式10: "m" Subscript, 3 , Baseline equals "h" prime left parenthesis, "a" , right parenthesism3=h′a
10
表达式11: "y" Subscript, 1 , Baseline equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "a" , right parenthesis plus "f" left parenthesis, "a" , right parenthesisy1=m1x−a+fa
11
表达式12: "y" Subscript, 2 , Baseline equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "a" , right parenthesis plus "g" left parenthesis, "a" , right parenthesisy2=m2x−a+ga
12
表达式13: "y" Subscript, 3 , Baseline equals "m" Subscript, 3 , Baseline left parenthesis, "x" minus "a" , right parenthesis plus "h" left parenthesis, "a" , right parenthesisy3=m3x−a+ha
