It could be the Real numbers or it could be the Complex plane.
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The domain is, but the range need not be.
the domain is all real numbers the range is from -1 to +1
the domain is when the denominator of the problem is set to zero... but i am not sure how to find the range
Any function is a mapping from a domain to a codomain or range. Each element of the domain is mapped on to a unique element in the range by the function.
What is the domain and range of absolute lxl - 5