Question: 5. (7 pts) f is a function that takes a real number x and performs these four steps in the order given: (1) Multiply by

5. (7 pts) f is a function that takes a real number x and performs these four steps in the order given: (1) Multiply by -2. (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.) (a) Find an expression for f (x). ( no explanation required) (b) State the domain of f. (no explanation required)

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