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  4. If the domain of a function is either R (real numbers) or a subset of R, then it is called a ...K.... Here, K refers to

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Q. If the domain of a function is either $R$ (real numbers) or a subset of $R$, then it is called a ...K.... Here, $K$ refers to

Relations and Functions

Solution:

A function which has either $R$ or one of its subsets as its range is called a real valued function. Further, if its domain is also either $R$ or a subset of $R$, it is called a real function.