Mathematics

Mathematics

Problem

Let ff be the function defined by f(x)=∣x−2∣f(x) = \sqrt{|x - 2|} for all xx . Which of the following statements is true?
Intuitive explanation

The key is recognizing that the absolute value creates a piecewise function with different behavior on either side of x=2x = 2. Since ∣x−2∣|x - 2| equals (x−2)(x - 2) when x≥2x \geq 2 and (2−x)(2 - x) when x<2x < 2, the square root function will have a sharp corner (cusp) at x=2x = 2 rather than a smooth curve. Understanding this shape—and whether ff is continuous, differentiable, or has other properties—will help you evaluate which statement holds.

Intuitive explanation

The key is recognizing that the absolute value creates a piecewise function with different behavior on either side of x=2x = 2. Since ∣x−2∣|x - 2| equals (x−2)(x - 2) when x≥2x \geq 2 and (2−x)(2 - x) when x<2x < 2, the square root function will have a sharp corner (cusp) at x=2x = 2 rather than a smooth curve. Understanding this shape—and whether ff is continuous, differentiable, or has other properties—will help you evaluate which statement holds.

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