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What is the result of x∈(-2,6)∩[1,8] on the number line?

Answer and explanation

Correct answer: [1,6)

The governing concept is intersection of intervals: an intersection contains only the real numbers that belong to both given sets. The first interval, (-2,6), contains numbers greater than -2 and less than 6; it excludes both endpoints. The second interval, [1,8], contains numbers from 1 through 8 and includes both endpoints. The common region begins at 1, because 1 belongs to both intervals, so the left endpoint is closed. It ends at 6, but 6 is excluded by (-2,6), so the right endpoint is open. Therefore the intersection is [1,6), which is option A. Option B reverses the endpoint inclusion, option C incorrectly excludes 1, and option D represents a union-like broad range rather than the common part.

Related tags

Linear InequalitiesInterval IntersectionNumber LineEndpointsClass 11Representation On Number LineMathematicsClass 11 Mcq

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