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Which of the following is a linear inequality?

Answer and explanation

Correct answer: 2x+3<9

A linear inequality in one variable has the variable only to the first power and does not contain products of variables, powers such as x², or non-linear operations such as a square root. In 2x+3<9, x has degree 1 and is multiplied only by the constant 2; the relation also uses an inequality sign, so it is a linear inequality. Option A is therefore correct. The expression x²<4 is quadratic because x has power 2. The expression √x<5 is not linear because it contains a radical, and xy>6 is not linear because it contains a product of variables. The classification concerns the algebraic form, not merely the presence of an inequality symbol.

Related tags

Linear-InequalitiesClassificationDegreeOne-Variable-InequalityIntroduction To InequalitiesLinear InequalitiesMathematicsClass 11 Mcq

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