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Solve the inequality ( \frac{x+1}{4}+\frac{x+3}{8}>1 ).

Answer and explanation

Correct answer: \(x>1\)

Multiplying both sides by the positive number 8 does not change the inequality sign: \(2(x+1)+(x+3)>8\). Hence, \(3x+5>8\), so \(3x>3\) and \(x>1\). The option \(x\geq1\) is incorrect because at \(x=1\), the left-hand side equals 1, not a value greater than 1. Exam tip: multiplying an inequality by a positive number keeps its sign unchanged.

Related tags

Linear InequalitiesFractional InequalitiesOne VariableAlgebraic SolutionClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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