表达式3: "g" left parenthesis, "x" , right parenthesis equals StartFraction, "d" Over "d" "x" , EndFraction "f" left parenthesis, "x" , right parenthesis left brace, negative 10 less than or equal to "x" less than or equal to "a" , right bracegx=ddxfx−10≤x≤a
3
表达式4: left parenthesis, "a" , "f" left parenthesis, "a" , right parenthesis , right parenthesisa,fa
4
表达式5: left parenthesis, "a" , "g" left parenthesis, "a" , right parenthesis , right parenthesisa,ga
5
表达式6: "y" minus "f" left parenthesis, "a" , right parenthesis equals "g" left parenthesis, "a" , right parenthesis left parenthesis, "x" minus "a" , right parenthesisy−fa=gax−a
