Johnston Davies
01/22/2023 · High School
\( ( ( A ^ { \prime } \cup C ^ { \prime } ) \cap B ) ^ { \prime } \quad \cup ( A \cup ( C \cap B ) ^ { \prime } \cup C ) ^ { \prime } \)
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Tutor-Verified Answer
Step-by-step Solution
To simplify the expression
\[
( ( A ^ { \prime } \cup C ^ { \prime } ) \cap B ) ^ { \prime } \quad \cup ( A \cup ( C \cap B ) ^ { \prime } \cup C ) ^ { \prime },
\]
we will use De Morgan's laws and properties of set operations.
1. **First part**: Simplify \( ( ( A ^ { \prime } \cup C ^ { \prime } ) \cap B ) ^ { \prime } \)
By De Morgan's law, we have:
\[
(X \cap Y)^{\prime} = X^{\prime} \cup Y^{\prime}.
\]
Thus,
\[
( ( A ^ { \prime } \cup C ^ { \prime } ) \cap B ) ^ { \prime } = ( A ^ { \prime } \cup C ^ { \prime })^{\prime} \cup B^{\prime}.
\]
Again applying De Morgan's law:
\[
( A ^ { \prime } \cup C ^ { \prime })^{\prime} = A \cap C.
\]
Therefore, we have:
\[
( ( A ^ { \prime } \cup C ^ { \prime } ) \cap B ) ^ { \prime } = (A \cap C) \cup B^{\prime}.
\]
2. **Second part**: Simplify \( ( A \cup ( C \cap B ) ^ { \prime } \cup C ) ^ { \prime } \)
Again, using De Morgan's law:
\[
(X \cup Y \cup Z)^{\prime} = X^{\prime} \cap Y^{\prime} \cap Z^{\prime}.
\]
We need to find \( ( C \cap B )^{\prime} \):
\[
( C \cap B )^{\prime} = C^{\prime} \cup B^{\prime}.
\]
Thus,
\[
( A \cup ( C \cap B )^{\prime} \cup C )^{\prime} = ( A \cup ( C^{\prime} \cup B^{\prime}) \cup C )^{\prime}.
\]
Applying De Morgan's law:
\[
= A^{\prime} \cap (C^{\prime} \cup B^{\prime})^{\prime} \cap C^{\prime}.
\]
Now, we simplify \( (C^{\prime} \cup B^{\prime})^{\prime} \):
\[
(C^{\prime} \cup B^{\prime})^{\prime} = C \cap B.
\]
Therefore, we have:
\[
( A \cup ( C \cap B )^{\prime} \cup C )^{\prime} = A^{\prime} \cap (C \cap B) \cap C^{\prime}.
\]
3. **Combine both parts**:
Now we combine the two parts:
\[
(A \cap C) \cup B^{\prime} \cup (A^{\prime} \cap (C \cap B) \cap C^{\prime}).
\]
This expression can be further simplified, but it is already in a relatively simple form.
Thus, the final simplified expression is:
\[
(A \cap C) \cup B^{\prime} \cup (A^{\prime} \cap C \cap B \cap C^{\prime}).
\]
Quick Answer
\[
(A \cap C) \cup B^{\prime} \cup (A^{\prime} \cap C \cap B \cap C^{\prime}).
\]
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