Decide Whether or Not the Set Is Closed Under Multiplication $\left\{ 1,3 ^ { 2 } , 3 ^ { 3 } , 3 ^ { 4 } , \ldots \right\}$

question 120

Multiple Choice

Decide whether or not the set is closed under multiplication.
- $\left\{ 1,3 ^ { 2 } , 3 ^ { 3 } , 3 ^ { 4 } , \ldots \right\}$

• A) Closed
• B) Not closed

---

Definitions:

MP3 Audio File

A digital audio format that uses a form of lossy data compression, making it a popular choice for storing music files and audio content.

Sound Card

An internal computer component that enables the processing and output of audio signals to speakers or headphones, enhancing the quality of sound.

Stand-Alone Player

A self-contained media player device or software that operates independently of other hardware or software.

Video Resolutions

Video resolutions indicate the number of pixels displayed on the screen, with higher resolutions offering clearer and sharper images.