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How do we write the interval ((1,6]) as an inequality?

Answer and explanation

Correct answer: (1<x\le 6)

The direct answer is option A, \\(1<x\\le6\\). Interval notation uses a round parenthesis when an endpoint is excluded and a square bracket when it is included. Thus the left parenthesis in \\( (1,6] \\) excludes 1, giving \\(x>1\\), while the right bracket includes 6, giving \\(x\\le6\\). Combining these gives \\(1<x\\le6\\). Option A is correct. Option B, \\(1\\le x<6\\), includes the wrong endpoint and excludes 6. Option C, \\(1<x<6\\), correctly excludes 1 but wrongly excludes 6. Option D, \\(1\\le x\\le6\\), includes both endpoints, which does not match the notation. Test the endpoints directly: 1 is out, 6 is in. A bracket means included; a parenthesis means excluded.

Related tags

Linear InequalitiesInterval NotationCompound Inequality

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