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For the function f(x) = ⌊2x⌋, what is its range when x ∈ [1, 1.5)?

Answer and explanation

Correct answer: {2}

For x ∈ [1, 1.5), we have 2x ∈ [2, 3). The greatest integer less than or equal to any number in [2, 3) is 2, so f(x) = 2 throughout the domain. Thus, the range is {2}; 3 is not attained because x = 1.5 is excluded.

Related tags

Relations And FunctionsGreatest Integer FunctionRangeReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeMathematicsClass 11 Mcq

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