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What is the minimum value of the function \(f(x)=|2x+4|+1\)?

Answer and explanation

Correct answer: 1

The modulus of any real number is non-negative, so \(|2x+4|\geq 0\). It attains its minimum value when \(2x+4=0\), giving \(x=-2\). Therefore, \(f(x)=0+1=1\). Hence, option A is correct; 0 is only the minimum value of the modulus term, not of the whole function. Exam tip: For an expression of the form \(|g(x)|+c\), check whether \(g(x)=0\) has a real solution; if it does, the minimum is \(c\).

Related tags

Standard-FunctionsModulus-GraphAbsolute-ValueMinimum-ValueGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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