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Which of the following inequalities has a solution set that is an open interval?

Answer and explanation

Correct answer: \(2<x<7\)

In \(2<x<7\), both inequalities are strict, so neither 2 nor 7 is included in the solution set. Hence, the solution set is the open interval \((2,7)\). Options B and C represent half-open intervals, while option D is a closed interval because both endpoints are included. Exam tip: An endpoint is open for < or >, and closed for \(\le\) or \(\ge\).

Related tags

Linear InequalitiesOne VariableInterval NotationOpen IntervalClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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