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Which option correctly writes \(x\in(-15,-7)\) in inequality form?

Answer and explanation

Correct answer: \(-15<x<-7\)

The interval \((-15,-7)\) has parentheses at both ends, so neither \(-15\) nor \(-7\) is included. Therefore, the correct inequality is \(-15<x<-7\). Option A is incorrect because it includes both endpoints. Exam tip: use \(<\) or \(>\) for parentheses, and \(\le\) or \(\ge\) for square brackets.

Related tags

Linear InequalitiesInterval NotationOpen IntervalNumber LineInequality FormRepresentation On Number LineMathematicsClass 11 Mcq

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