Piecewise Functions
http://www.math.siu.edu/previews/150/150_topic2.pdf
http://www.myeducationkey.com/k-12-lecture/15/limits-with-piecewise-functions.htm
http://www.educreations.com/lesson/view/writing-piecewise-functions/1801006/
http://www.youtube.com/watch?v=hy0N-90gCu0
http://www.youtube.com/watch?v=-gwffMEr8i8
http://www.uiowa.edu/~examserv/mathmatters/tutorial_quiz/geometry/piecewisefunctions.html
http://www.educreations.com/lesson/view/piecewise-functions/8590683/
http://www.math.siu.edu/previews/150/150_topic2.pdf
http://www.myeducationkey.com/k-12-lecture/15/limits-with-piecewise-functions.htm
http://www.educreations.com/lesson/view/writing-piecewise-functions/1801006/
http://www.youtube.com/watch?v=hy0N-90gCu0
http://www.youtube.com/watch?v=-gwffMEr8i8
http://www.uiowa.edu/~examserv/mathmatters/tutorial_quiz/geometry/piecewisefunctions.html
http://www.educreations.com/lesson/view/piecewise-functions/8590683/