Calc 1, Lec 9A: Limits of Rational Functions (Asymptotes, Removable Discontinuities), and Abs(x)/x

(0:00) Introduction and Sinusoidal Modeling in Mathematica.
(5:22) Rational Function Example 1 with a removable discontinuity (degree of top = degree of bottom).
(13:25) Rational Function Example 2 with a removable discontinuity (degree of bottom = 3, degree of top = 2).
(26:34) Rational Function Example 3 with a removable discontinuity (degree of bottom = 2, degree of top = 3). This has a slant asymptote.
(34:14) Example 4: the function f(x) = |x|/x.