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Which is the set of numbers less than or equal to 66 or greater than or equal to 1212?\newlineChoices:\newline(A)\{x | x < 6 \text{ or } x > 12\} \newline(B)\{x | x < 6 \text{ and } x > 12\} \newline(C){xx6 and x12}\{x | x \leq 6 \text{ and } x \geq 12\} \newline(D){xx6 or x12}\{x | x \leq 6 \text{ or } x \geq 12\}

Full solution

Q. Which is the set of numbers less than or equal to 66 or greater than or equal to 1212?\newlineChoices:\newline(A){xx<6 or x>12}\{x | x < 6 \text{ or } x > 12\} \newline(B){xx<6 and x>12}\{x | x < 6 \text{ and } x > 12\} \newline(C){xx6 and x12}\{x | x \leq 6 \text{ and } x \geq 12\} \newline(D){xx6 or x12}\{x | x \leq 6 \text{ or } x \geq 12\}
  1. Understand the problem: Understand the problem.\newlineWe need to find the set of numbers that are either less than or equal to 66 or greater than or equal to 1212. This means we are looking for two separate ranges of numbers.
  2. Identify inequality signs: Identify the correct inequality signs.\newlineFor numbers less than or equal to 66, we use the inequality sign \leq. For numbers greater than or equal to 1212, we use the inequality sign \geq.
  3. Determine logical connector: Determine the logical connector.\newlineThe problem asks for numbers that are either in one range or the other, which means we are looking for a union of two sets. The correct logical connector for a union is “or”\text{“or”}.
  4. Translate into set notation: Translate the problem into set notation.\newlineUsing the inequality signs and the logical connector identified in the previous steps, we can write the set notation as xx6 or x12{x | x \leq 6 \text{ or } x \geq 12}.
  5. Match with choices: Match the set notation to the given choices.\newlineThe correct set notation xx6 or x12{x | x \leq 6 \text{ or } x \geq 12} matches choice (D).

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