Expression 1: "f" left parenthesis, "x" , right parenthesis equals 128 left brace, 0 less than or equal to "x" less than or equal to 8 , right bracefx=1280≤x≤8
1
Expression 2: "f" left parenthesis, "x" , right parenthesis greater than or equal to "y" greater than or equal to 0fx≥y≥0