How to find a two-sided limit by investigating one-sided limits.
How to show that a function is discontinuous at a point x=a because it is not defined there.
How to determine whether a function f(x) is continuous at a particular point x=a.
How to determine one-sided and two-sided limits from the graph of a function.
How to differentiate a quotient of two functions.
How to differentiate a product of two functions.
How to evaluate the limit of a function at points where it is not continuous.
How to define the derivative of a function at a point x=a.
How to compute the derivative of a polynomial function using two properties of the derivative.
How to use one-sided limits to show that a limit does not exist.