Critical Numbers
A series of free Calculus Video Lessons.
The following diagram gives the definition of a critical number. Scroll down the page for more examples of how to find the critical numbers of a rational number.
How to find the critical numbers of a rational function?
Finding Critical Numbers - Example 1
This video shows how to find the critical numbers of a rational function.
Finding Critical Numbers - Example 2
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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