A rational function is a function that is a fraction of the form f(x) = P(x)/Q(x) , where p(x) and q(x) are polynomials and q(x) does not equal zero e.g. f(x) = 1/(x+2) , g(x) = 1/(x

The domain of a rational function consists of all real numbers x except those for which the denominator is zero. When graphing a rational function, we must pay special attention to the behavior of the graph near those x-values. Let us find domain of f(x) = 1/(x+3)

x = -3

Enter different rational functions in the input box of the applet below and try to find the domain , range and asymptote.

^{2}-x-2) are examples of rational functions where f and g are the names of the functions and x is the independent variable.The domain of a rational function consists of all real numbers x except those for which the denominator is zero. When graphing a rational function, we must pay special attention to the behavior of the graph near those x-values. Let us find domain of f(x) = 1/(x+3)

- The function has independent variable (x) in the denominator
- Set the denominator equal to zero

x = -3

- The domain of function f is all real numbers except x = -3

Enter different rational functions in the input box of the applet below and try to find the domain , range and asymptote.

In mathematics, a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, with the denominator q not equal to zero. Since q may be equal to 1, every integer is a rational number.

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