Calculus: 1001 Practice Problems For Dummies (+ Free Online Practice). Patrick Jones

       Using graphs to find limits

       Finding left-hand and right-hand limits

       Determining infinite limits and limits at infinity

       Practicing many algebraic techniques to evaluate limits of the form 0/0

       Determining where a function is continuous

       When substituting in the limiting value, a value of zero in the denominator of a fraction doesn't automatically mean that the limit does not exist! For example, if the function has a removable discontinuity, the limit still exists!

       Be careful with signs, as you may have to include a negative when evaluating limits at infinity involving radicals (especially when the variable approaches negative infinity). It’s easy to make a limit positive when it should have been negative!

       Know and understand the definition of continuity, which says the following: A function f(x) is continuous at a if .