Question

What does $R$ mean in the domain?

Answer 1

$R$ mean in domain:

• A relation is said to be a function only if for every input value, there is exactly one output value.
• A function consists of a domain and range. The domain is the input values and the range is the output values.
• For a function $y=f\left(x\right)$, for every input value of $x,$ there will be one corresponding value for $y$.
• The variable $R$ denotes the set of real numbers i.e., every value in the domain belongs to the set of real numbers.