運算式 3: "h" left parenthesis, "x" , right parenthesis equals "x" left brace, "x" greater than or equal to 0 , right bracehx=xx≥0
3
運算式 4: "j" left parenthesis, "x" , right parenthesis equals 9750 left brace, "x" greater than or equal to 0 , right bracejx=9750x≥0
4
運算式 5: "k" left parenthesis, "x" , right parenthesis equals StartFraction, left parenthesis, 500 minus 0.0 2 8 "x" , right parenthesis Over 0.0 7 3 , EndFraction left brace, 0 less than or equal to "x" less than or equal to 17857 , right bracekx=500−0.028x0.0730≤x≤17857
