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What is the minimum value of the function \(y=|x+1|+|x-3|\)?

Answer and explanation

Correct answer: 4

The expression represents the sum of the distances of x from −1 and 3 on the number line. For −1≤x≤3, this sum remains constant at 3−(−1)=4, so the minimum value is 4. It cannot be 0 because both absolute-value terms cannot be zero simultaneously. Exam tip: the minimum of |x−a|+|x−b| is |a−b|.

Related tags

GraphsModulus FunctionsMinimum ValueAbsolute ValueGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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