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Which value is not a solution of −4 < x ≤ 3?

Answer and explanation

Correct answer: x = −4

A compound inequality must be read as two conditions at the same time: x is greater than −4 and x is less than or equal to 3. The strict sign < excludes the left endpoint −4, while the inclusive sign ≤ includes the right endpoint 3. Therefore −3 and 0 are inside the interval, and 3 is also valid because equality at the upper endpoint is allowed. However, x = −4 is exactly equal to the excluded lower boundary, so it is not a solution. Option D is correct. On a number line, the solution set is shown with an open circle at −4, a closed circle at 3, and all points between them selected. This endpoint test distinguishes D from the other three choices without any additional calculation.

Related tags

Compound-InequalityEndpoint-CheckNumber-LineIntroduction To InequalitiesLinear InequalitiesMathematicsClass 11 Mcq

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