Question

although most graphs have at one horizontal asymptote, it is possible for a graph to have more than one. Which of the following functions have graphs with more than one horizontal asymptote? (state them and give reasons, please?)

a) f(x)=abs(x^3+1)/(8-x^3)
b) g(x)= abs(x-1)/(x^2-4)
c)h(x)= x/√(x^2-4)