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What is the result of (-∞, 2] ∩ [-5, 7) on the number line?

Answer and explanation

Correct answer: [-5, 2]

The intersection symbol ∩ means that a number must belong to both intervals. The first interval contains every real number less than or equal to 2, while the second contains numbers from -5 through values less than 7. Their common portion begins at -5 and ends at 2. Both endpoints are included: -5 is included by [-5, 7), and 2 is included by (-∞, 2]. Hence the intersection is [-5, 2], so option B is correct. Option A wrongly excludes -5; option C includes values greater than 2; option D includes numbers outside the common region.

Related tags

Linear-InequalitiesIntervalsIntersectionRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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