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Class 11 Mathematics Relations and Functions Real-Valued Functions, Their Domain and RangeMedium

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If (f(x)=\sqrt{x+2}), what is (x) when (f(x)=3)?

Answer and explanation

Correct answer: (7)

(\sqrt{x+2}=3) gives (x+2=9) and (x=7). In exams keep the domain condition valid after squaring.

Related tags

Real-Valued-Functions Function-Equation Range Real Valued Functions Their Domain And Range Real Valued Functions Their Domain And Range Relations And Functions Mathematics Class 11 Mcq

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