Question

Express the interval using inequality notation.

(−∞,3]

Answer 1

Answer:

Solution: Use an open dot at 3 and shade all real numbers strictly less than 3. Use negative infinity. (−∞) to indicate that the solution set is unbounded to the left on a number line. Example 2: Graph and give the interval notation equivalent: x≤5 x ≤ 5 .

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