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Which interval represents \(1<x\le 8\) on the number line?

Answer and explanation

Correct answer: \((1,8]\)

Interval notation records whether each endpoint is included. The inequality \(1<x\) is strict, so the value 1 is excluded and must be written with a parenthesis. The condition \(x\le 8\) includes 8, so the right endpoint uses a square bracket. Combining both conditions gives the interval \((1,8]\), which is option C. On a number line, this is shown by an open circle at 1, a closed circle at 8, and a shaded segment between them. Option A incorrectly includes 1, option B incorrectly excludes 8, and option D includes 1 while excluding 8. Thus the endpoint symbols directly follow the inequality signs.

Related tags

Interval NotationNumber LineCompound InequalityRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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