Math Help Urgent

Question

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

(1) Multiply by 3.

(2) Subtract 9.

(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)

Answer 1

x

3x

3x-9

sqr(3x-9)

1/sqr(3x-9)

f(x) = 1/sqr(3x-9)

domain is x> or = 3