Excluded Values for Rational Expressions
Add yours
Sorry, we don't have any videos for this topic yet.
Let teachers know you need one by requesting it
Key Questions

The only rule with rational expression is that the denominator can't be zero, since you can't divide by zero.
Remember that an expression is said to be rational only if variables appear at the denominator: thus
#\frac{\cos(x)+3x^2}{2}# is NOT a rational expression.If you actually have an expression in which variables appear at the denominator, you must exclude the values of the variables for which the expression at the denominator becomes 0. In formulas, if you have an expression like
#\frac{f(x)}{g(x)]# , such an expression is defined for all#x# such that#g(x)\ne 0# . 
They are all values that make the denominator zero.
I hope that this was helpful.

This key question hasn't been answered yet. Answer question

This key question hasn't been answered yet. Answer question
Questions
Rational Equations and Functions

1Inverse Variation Models

2Graphs of Rational Functions

3Division of Polynomials

4Excluded Values for Rational Expressions

5Multiplication of Rational Expressions

6Division of Rational Expressions

7Addition and Subtraction of Rational Expressions

8Rational Equations Using Proportions

9Clearing Denominators in Rational Equations

10Surveys and Samples