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What is the interval form of |x| < 3 on the number line?

Answer and explanation

Correct answer: (−3, 3)

The governing concept is the distance interpretation of absolute value. The statement |x| < 3 means that the distance of x from zero is less than 3. Therefore, x must lie strictly between −3 and 3, which can be written as −3 < x < 3. Since the inequality is strict, neither endpoint is included, so both ends use round brackets. The interval is consequently (−3, 3), making option A correct. Option B includes the endpoints and would represent |x| ≤ 3. Option C describes values whose distance from zero is greater than 3, and option D includes only the right-hand portion, so neither matches the given condition.

Related tags

Absolute ValueOpen IntervalNumber LineRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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