2.2 Set Operations: Discrete Mathematics and its application

In summary, set operations in discrete mathematics involve manipulating and comparing sets, which are collections of objects or elements. They are important because they allow us to study and analyze finite collections of objects and their relationships, and are used in real-world problems such as in computer science and statistics. The difference between union and intersection is that the union combines sets, while the intersection finds the shared elements. Venn diagrams are commonly used to represent set operations, with the universal set represented by a rectangle and each set represented by a circle. Set operations are used in various real-life situations, such as in data analysis and decision-making, database management, and search algorithms.
  • #1
modzz
8
0
page.130 Ex.20

Ex.20
Show that if A and B are sets, then (A[tex]\cap[/tex]B) [tex]\bigcup[/tex] (A[tex]\cap[/tex]B) = A.

how do u solve this?



The Attempt at a Solution

 
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  • #2
You can't. It's false.
 
  • #3
modzz:

did you possibly mis-type? Do you mean to show

[tex]
(A \cap B) \cup (A - B) = A
[/tex]
 
  • #4
modzz said:
page.130 Ex.20

Ex.20
Show that if A and B are sets, then (A[tex]\cap[/tex]B) [tex]\bigcup[/tex] (A[tex]\cap[/tex]B) = A.

how do u solve this?



The Attempt at a Solution


I'm having trouble with this question as well. The second B has a line above it if that means anything. Please help me.
 

1. What are set operations in discrete mathematics?

Set operations in discrete mathematics involve manipulating and comparing sets, which are collections of objects or elements. These operations include union, intersection, complement, and difference.

2. Why are set operations important in discrete mathematics?

Set operations are important in discrete mathematics because they allow us to study and analyze finite collections of objects and their relationships. They are also used to solve real-world problems, such as in computer science and statistics.

3. What is the difference between union and intersection of sets?

The union of two sets contains all the elements that are in either set, while the intersection of two sets contains only the elements that are common to both sets. In other words, the union combines sets, while the intersection finds the shared elements.

4. How do you represent set operations using Venn diagrams?

Venn diagrams are commonly used to represent set operations. The universal set is represented by a rectangle, and each set is represented by a circle inside the rectangle. The elements that are in both sets are represented by the overlapping region of the circles.

5. Can you give an example of how set operations are used in real-life situations?

Set operations are used in various real-life situations, such as in data analysis and decision-making. For example, a marketing team may use set operations to determine the target audience for a product by finding the intersection of sets representing age ranges, income levels, and interests. Set operations are also used in database management and search algorithms.

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