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Which interval notation represents x > 3?

Answer and explanation

Correct answer: (3, ∞)

The inequality x > 3 means that x can be any real number strictly greater than 3. Since 3 itself is not allowed, a parenthesis is placed at 3. The values continue without bound toward positive infinity, and infinity is never an included number, so a parenthesis is also used there. Hence the interval is (3, ∞).

Related tags

SetsInterval NotationOpen IntervalLinear InequalityReal NumbersRepresentation On Number LineLinear InequalitiesMathematics

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