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What is the domain of the graph of (f(x)=√(x+4)-2)?

Answer and explanation

Correct answer: x ≥ -4

The governing concept is the real-valued domain of a square-root function. A square root is defined over the real numbers only when its radicand is non-negative. Here the radicand is x+4, so we require x+4≥0. Subtracting 4 from both sides gives x≥−4. The endpoint is included because √0 is defined and equals 0; therefore x=−4 is allowed. The vertical shift by −2 changes the output values but does not restrict the inputs. Hence option A is correct. Option B reverses the sign incorrectly, option C uses the wrong direction of inequality, and option D wrongly excludes the valid endpoint.

Related tags

DomainSquare RootReal-Valued FunctionsFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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