What is the slant asymptote of f(x)=x3+x2+1x2−1f(x) = \frac{x^3 + x^2 + 1}{x^2 - 1}f(x)=x2−1x3+x2+1?
y=xy = xy=x
y=x+1y = x+1y=x+1
y=0y = 0y=0
y=x−1y = x-1y=x−1