# Given that Domain of the rational function is all real numbers. So the rational function should not contain denominator part.

Given that Domain of the rational function is all real numbers.
So the rational function should not contain denominator part.
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SchulzD
So the required rational function only contains numerator part.
The required rational function is in the form of
$f\left(x\right)=Kx\left(x-a\right)\left(x-b\right)$
where k, a, and b are constants.