Question 1134036


start with {{{f (x)=x}}}
(1) Multiply by {{{3}}}.=>{{{f (x)=3x}}}
(2) Subtract {{{9}}}.=>{{{f (x)=3x-9}}}
(3) Take the square root. =>{{{f (x)=sqrt(3x-9)}}}
(4) Take the reciprocal. =>{{{f (x)=1/sqrt(3x-9)}}}(That is, make the quantity the denominator of a fraction with numerator 1.) 


a.	Find an expression for f (x). (no explanation required) 

 {{{f (x)=1/sqrt(3x-9)}}}

b.	State the domain of f. (no explanation required) 

{ {{{x}}} element R : {{{x>3}}} }