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What is the correct interval form of −3 < x ≤ 0?

Answer and explanation

Correct answer: (−3,0]

The inequality −3 < x excludes −3 because x must be strictly greater than −3. Therefore, the left endpoint uses a parenthesis. The inequality x ≤ 0 includes 0 because equality is permitted, so the right endpoint uses a square bracket. Reading the two endpoint conditions independently gives the interval (−3,0]. This is a half-closed, half-open interval.

Related tags

Mixed-InequalityHalf-Closed-IntervalEndpoint-RulesRepresentation On Number LineLinear InequalitiesMathematicsClass 12 Mcq

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