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Which inequality has the solution set \([4,\infty)\)?

Answer and explanation

Correct answer: \(2x-8\geq 0\)

For option B, \(2x-8\geq 0\) gives \(2x\geq 8\), so \(x\geq 4\). Hence, the solution set is \([4,\infty)\). Option A gives \(x>4\), whose solution set is \((4,\infty)\), so 4 is excluded. Exam tip: a square bracket indicates that the endpoint is included, which corresponds to an inequality containing equality.

Related tags

Linear InequalitiesInterval NotationSolution SetClosed EndpointInequality SymbolsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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