Question

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

• A. real function
• B. real valued function
• C. real function or real valued function
• D. None of the above

Answer 1

Answer: (A)

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.