What is the domain and range for h(x)= x^2 - 5?

1 Answer
George C.
May 20, 2015

The domain is (probably) the whole of RR, the set of all real numbers since the function h(x) is well defined for all values of x in RR. The reason I say RR rather than CC, NN, ZZ or QQ is based on the notational convention that x normally stands for a real number.

If the domain is RR, then the range is {y in RR: y >= -5}.

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