Expression 3: 0 greater than or equal to "y" greater than or equal to negative StartFraction, exp left parenthesis, "k" times "r" left parenthesis, floor left parenthesis, 100 "x" , right parenthesis , right parenthesis , right parenthesis Over exp left parenthesis, "k" , right parenthesis , EndFraction0≥y≥−expk·rfloor100xexpk