Intercepts, asymptotes, sketch for cubic over radical: ![]()
The x-intercept: Where the function is zero, or the numerator is zero and the denominator is non-zero: x3 = 0, or x = 0. Since the function is not defined at x = 0, there is no x-intercept.
The y-intercept: Where x = 0: Since the function is not defined at x = 0, there is no y-intercept.
Vertical asymptote: where the denominator is zero: x2 - 9 = 0, or x = 3, x = -3.
Horizontal asymptote: The limit of the function at infinity:
We can use the Limit at Infinity for Rational Functions: ![]()
Draw your graph, and then check it.