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Given the sets [tex]\( A = \{1, 2, 3, 4, 5\} \)[/tex], [tex]\( B = \{y : y = x + 3, x \in A\} \)[/tex], and [tex]\( C = \{z : z = 2x, x \in A\} \)[/tex], answer the following questions:

a. List the elements of Sets [tex]\( B \)[/tex] and [tex]\( C \)[/tex] separately.

b. What type of sets are [tex]\( B \)[/tex] and [tex]\( C \)[/tex]?

c. Show the sets [tex]\( B \)[/tex] and [tex]\( C \)[/tex] in a Venn diagram.


Sagot :

Sure, let's go through this step by step.

### a. List the Elements of Set B and Set C

Given Set [tex]\( A = \{1, 2, 3, 4, 5\} \)[/tex]:

1. For Set B:
- Determined by the rule [tex]\( B = \{y: y = x + 3, x \in A\} \)[/tex].
- Compute the elements of Set B:
[tex]\[ \begin{align*} \text{If } x = 1, & \quad y = 1 + 3 = 4 \\ \text{If } x = 2, & \quad y = 2 + 3 = 5 \\ \text{If } x = 3, & \quad y = 3 + 3 = 6 \\ \text{If } x = 4, & \quad y = 4 + 3 = 7 \\ \text{If } x = 5, & \quad y = 5 + 3 = 8 \\ \end{align*} \][/tex]
- Therefore, Set B is [tex]\( \{4, 5, 6, 7, 8\} \)[/tex].

2. For Set C:
- Determined by the rule [tex]\( C = \{Z: Z = 2x, x \in A\} \)[/tex].
- Compute the elements of Set C:
[tex]\[ \begin{align*} \text{If } x = 1, & \quad Z = 2 \times 1 = 2 \\ \text{If } x = 2, & \quad Z = 2 \times 2 = 4 \\ \text{If } x = 3, & \quad Z = 2 \times 3 = 6 \\ \text{If } x = 4, & \quad Z = 2 \times 4 = 8 \\ \text{If } x = 5, & \quad Z = 2 \times 5 = 10 \\ \end{align*} \][/tex]
- Therefore, Set C is [tex]\( \{2, 4, 6, 8, 10\} \)[/tex].

### b. Type of Set B and Set C

- Both Set B and Set C are finite sets.
- A finite set is a set that has a limited number of elements. Since both Set B and Set C have a specific, countable number of elements, they are finite.

### c. Venn Diagram of Sets B and C

To draw the Venn diagram for Sets B (\{4, 5, 6, 7, 8\}) and C (\{2, 4, 6, 8, 10\}), you can follow these steps:

1. Overlap/Intersection: Identify the common elements:
[tex]\[ B \cap C = \{4, 6, 8\} \][/tex]

2. Separate Parts:
- B only: \{5, 7\}
- C only: \{2, 10\}

Here is the Venn diagram:

```
______
/ \
/ B \
/ (4,6,8) \
/ 5,7 \
/_____________\
\ ______ /
\ / \
\6 / C \
\(4,6,8) \
\ 2,10 /
\_______/
```

In the Venn Diagram:

- The intersection (the overlapping area) of the two circles contains the elements \{4, 6, 8\}.
- The part exclusive to B contains \{5, 7\}.
- The part exclusive to C contains \{2, 10\}.

This concludes the step-by-step detailed solution for the given problem.