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What is the domain and range of a rational function?

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Rational function, fx=PxQx where Px and Qx are polynomial and Qx0.Therefore, domain of fx is all real numbers except those values of x for which Qx=0.The range of rational function is different for different functions.Ex: fx= 1x2Domain:x2 is 0 for x=0Therefore, domain of fx is R-0Range:The value of x2 will always be positive and so 1x2 will also be always positive.Hence, range of fx is 0,

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