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If f: ℝ → ℝ is given by f(x) = |x − 2| + 3, what is its range?

Answer and explanation

Correct answer: [3, ∞)

The governing property is |t| ≥ 0 for every real t, with equality only when t = 0. Therefore |x − 2| + 3 ≥ 3 for every real x. The minimum value 3 is actually attained when x − 2 = 0, that is, when x = 2. As x moves away from 2, the absolute-value term can become any nonnegative real number, so the function can produce every value from 3 upward. Consequently, the range is [3, ∞), including 3. Option B wrongly excludes the attained minimum, option C reverses the direction of the possible values, and option D includes values below 3 that the formula can never produce. Thus option A is correct.

Related tags

RangeAbsolute ValueReal-Valued FunctionsModulusReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematics

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