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The graph of the function \(y=\sqrt{x^2}\) is identical to the graph of which function?

Answer and explanation

Correct answer: \(y=|x|\)

For every real value of \(x\), \(\sqrt{x^2}=|x|\), so the given graph is exactly the graph of \(y=|x|\). The graph \(y=x\) agrees only when \(x\ge 0\); for negative \(x\), \(|x|=-x\). Exam tip: simplify \(\sqrt{x^2}\) as \(|x|\), not simply as \(x\).

Related tags

GraphsAbsolute ValueSquare Root FunctionsStandard FunctionsRelations And FunctionsGraphs Of Standard FunctionsMathematicsClass 11 Mcq

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