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What is the solution of the compound inequality \\(-3\leq\frac{x+1}{2}<4\\)?

Answer and explanation

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

Multiplying all parts of the inequality by the positive number 2 does not reverse the signs, giving \\(-6\leq x+1<8\\). Subtracting 1 from all parts yields \\(-7\leq x<7\\), so option A is correct. Option B incorrectly reverses the endpoint conditions. Exam tip: an inequality sign reverses only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesCompound InequalitiesOne Variable InequalitiesAlgebraic SolutionAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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