Expression 6: 0 less than or equal to "y" less than or equal to "f" left parenthesis, floor left parenthesis, StartFraction, "n" left parenthesis, "x" minus "a" , right parenthesis Over "b" minus "a" , EndFraction , right parenthesis StartFraction, "b" minus "a" Over "n" , EndFraction plus "a" , right parenthesis left brace, "a" less than or equal to "x" less than or equal to "b" , right brace0≤y≤ffloornx−ab−ab−an+aa≤x≤b
6
Expression 7: 0 greater than or equal to "y" greater than or equal to "f" left parenthesis, floor left parenthesis, StartFraction, "n" left parenthesis, "x" minus "a" , right parenthesis Over "b" minus "a" , EndFraction , right parenthesis StartFraction, "b" minus "a" Over "n" , EndFraction plus "a" , right parenthesis left brace, "a" less than or equal to "x" less than or equal to "b" , right brace0≥y≥ffloornx−ab−ab−an+aa≤x≤b