運算式 1: "f" left parenthesis, "x" , right parenthesis equals "x" squared left parenthesis, "x" minus 5 , right parenthesis squared left parenthesis, "x" minus 2 , right parenthesis squaredfx=x2x−52x−22
1
運算式 2: "f" left parenthesis, "x" , right parenthesis plus "f" left parenthesis, 5 minus "x" , right parenthesis left brace, 0 less than or equal to "x" less than or equal to 5 , right bracefx+f5−x0≤x≤5
