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The rational function

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We know that all possible values of x  is domain of a function.

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A rational function is simply fraction and in a fraction the denominator cannot be equal to 0 because it would be undefined.

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To find which number make the fraction undefined create an equation where the denominator is not equal to zero.

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So the domain of the function all real numbers except  0 and 5.

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Range: The range is the set of all possible output values (usually the variable y, or sometimes expressed as f(x)), which result from using a particular function.

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Domain set

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The range of the function  is all Real numbers.

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