Decide Whether or Not the Set Is Closed Under Multiplication

question 85

Multiple Choice

Decide whether or not the set is closed under multiplication.
-{1, 2, 3, 4, . . .}

• A)Not closed
• B)Closed

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A state of having increased stamina or vitality, often seen as beneficial in both personal and professional contexts.

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Individuals who start, organize, manage, and assume the risks of a business or enterprise, often innovating and creating new products or services.

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Quick to lose confidence or enthusiasm in the face of challenges or setbacks.

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Individuals who initiate, manage, and assume the risks of starting and operating a new business venture.