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In the graph of f(x) = ⌊x⌋, what is the value of y on the interval [1, 2)?

Answer and explanation

Correct answer: 1

The governing concept is the floor function, defined by ⌊x⌋ equal to the greatest integer less than or equal to x. For every x in the half-open interval [1, 2), the inequalities are 1 ≤ x < 2. The greatest integer not exceeding any such x is therefore 1, so f(x) = ⌊x⌋ = 1 throughout the interval. Thus option B is correct. The left endpoint x = 1 is included and gives 1, whereas x = 2 is excluded because the value would jump to 2 there. This explains the half-open notation. Option D is incorrect because the floor graph is stepwise rather than the continuous line y = x; options A and C do not match the defining integer value on the interval.

Related tags

Floor-FunctionStep-GraphsIntervalsGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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