Answer to Question #5585 in Calculus for Freddy

Question

find the domain of the function f(x)= x
---------
x^2 - 9

Answer 1

all real number without -3 and 3. Why? our function is rational function so its
domain is all real numbers without zeros of denominatorю so we must find zeros
of x^2-9 so x^2-9=0 so x^2=9 so x=3,x=-3.