TRUE OR FALSE EXPLAIN 1) The function f(x)=√x/(x-3) is a rational function
2) the domain of f(x)= x+2/x-2 is (-infinity , -2) u (-2,2) u (2, infinity)
3) the x-axis is a horizontal asymptote for the graph of f(x) = 3x-1/x^2-5
4) the graph of a rational function cannot intersect its asymptote
5) the graph of f(x)= 4/x^2-9 is symmetric about the y-axis
6) the graph of f(x)=2x+6/x^2-9 has only one vertical asymptote