SOLUTION: Please help me solve this equation (((f(x)= √4x+16))) Consider the function a) Find the domain and range. b) Find f(3). Please show work. I do not understand this

Algebra ->  Functions -> SOLUTION: Please help me solve this equation (((f(x)= √4x+16))) Consider the function a) Find the domain and range. b) Find f(3). Please show work. I do not understand this      Log On


   

Question 723664: Please help me solve this equation (((f(x)= √4x+16)))
Consider the function
a) Find the domain and range.
b) Find f(3).
Please show work. I do not understand this at all and wish to know how to figure this stuff out on my own.
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
if you have this:
f%28x%29=sqrt%284x%29%2B16


b) Find f%283%29
f%283%29=sqrt%284%2A3%29%2B16
f%283%29=sqrt%2812%29%2B16
f%283%29=3.46%2B16
f%283%29=19.46




but, if you have this:
f%28x%29=sqrt%284x%2B16%29



b) Find f%283%29
f%283%29=sqrt%284%2A3%2B16%29
f%283%29=sqrt%2812%2B16%29
f%283%29=sqrt%2828%29
f%283%29=5.29