Which is the set of numbers less than or equal to4 or greater than 7?Choices:(A)\{x | x \leq 4 \text{ or } x > 7\} (B)\{x | x \leq 4 \text{ or } x < 7\} (C)\{x | x < 4 \text{ or } x \geq 7\} (D)\{x | x < 4 \text{ and } x \geq 7\}
Q. Which is the set of numbers less than or equal to 4 or greater than 7?Choices:(A){x∣x≤4 or x>7}(B){x∣x≤4 or x<7}(C){x∣x<4 or x≥7}(D){x∣x<4 and x≥7}
Understand the problem: Understand the problem. We need to find the set of numbers that are either less than or equal to 4 or greater than 7.
Identify inequality signs: Identify the correct inequality signs for the conditions given. For numbers less than or equal to 4, we use x≤4. For numbers greater than 7, we use x > 7.
Combine conditions: Combine the two conditions using the word "or" as indicated in the problem. The correct set notation will include both conditions separated by "or".
Match with choices: Match the combined condition with the given choices. The correct set notation that represents the set of numbers less than or equal to 4 or greater than 7 is \{x | x \leq 4 \text{ or } x > 7\}.
Verify answer: Verify the answer by checking if any other choice could potentially match the conditions. Choice (B) "{x | x \leq 4 \text{ or } x < 7}" includes numbers between 4 and 7, which is not what we want. Choice (C) "{x | x < 4 \text{ or } x \geq 7}" excludes the number 4 and includes numbers equal to 7, which is also incorrect. Choice (D) "{x | x < 4 \text{ and } x \geq 7}" is not possible because a number cannot be both less than 4 and greater than or equal to 7 at the same time.