Expression 5: "f" left parenthesis, "x" , right parenthesis equals "k" Subscript, 1 , Baseline plus StartFraction, "k" Subscript, 2 , Baseline Over 1 minus "x" , EndFraction left brace, 0 less than or equal to "x" less than or equal to 1 , right bracefx=k1+k21−x0≤x≤1