) f is a function that takes a real number x and performs these four steps in the order given: (1) Multiply by -4. (2) Add 4. (3) Take the square...

)  f is a function that takes a real number x and performs these four steps in the order given:

              (1) Multiply by -4.

              (2) Add 4.

              (3) Take the square root.

              (4) Take the reciprocal. (That is, make the quantity the denominator of a fraction with numerator 1.)