Math Problem Statement

Find the set A ∩ (B ∪ C)'. Write your answer in roster form or as ∅, given the Venn diagram showing sets A, B, C, and the universal set U.

Solution

We are asked to find A(BC)A \cap (B \cup C)', where (BC)(B \cup C)' is the complement of BCB \cup C in the universal set UU, and then intersect that set with AA.

Step-by-Step Process:

  1. Find BCB \cup C:

    • From the Venn diagram, BCB \cup C includes all elements that are in either BB, CC, or both.
    • Elements in BB are: g,h,x,yg, h, x, y.
    • Elements in CC are: x,y,r,zx, y, r, z.
    • Therefore, BC={g,h,x,y,r,z}B \cup C = \{ g, h, x, y, r, z \}.
  2. Find the complement (BC)(B \cup C)':

    • The complement consists of all elements in UU that are not in BCB \cup C.
    • From the Venn diagram, the universal set UU includes: f,g,h,p,q,r,x,y,zf, g, h, p, q, r, x, y, z.
    • Removing the elements of BC={g,h,x,y,r,z}B \cup C = \{ g, h, x, y, r, z \}, we are left with (BC)={f,p,q}(B \cup C)' = \{ f, p, q \}.
  3. Find A(BC)A \cap (B \cup C)':

    • Now, we need to find the intersection of set AA with (BC)(B \cup C)'.
    • Elements in AA are: f,g,p,xf, g, p, x.
    • Intersecting AA with (BC)={f,p,q}(B \cup C)' = \{ f, p, q \}, we get A(BC)={f,p}A \cap (B \cup C)' = \{ f, p \}.

Final Answer:

A(BC)={f,p}A \cap (B \cup C)' = \{ f, p \}

Would you like more details on any of these steps or have any questions?


Here are five related questions you might find useful:

  1. What is the difference between the complement and the union of sets?
  2. How would the result change if we took the complement of AA instead of BCB \cup C?
  3. How do you interpret A(BC)A \cap (B \cup C)' if the sets were infinite?
  4. Can we use De Morgan’s Law to simplify operations with complements in sets?
  5. What are common uses of Venn diagrams in probability theory?

Tip: Always carefully analyze set complements—sometimes visualizing them in a Venn diagram helps to avoid mistakes.

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Math Problem Analysis

Mathematical Concepts

Set Theory
Intersection of Sets
Union of Sets
Set Complements

Formulas

Intersection: A ∩ B = {x | x ∈ A and x ∈ B}
Union: A ∪ B = {x | x ∈ A or x ∈ B}
Complement: A' = {x | x ∉ A in U}

Theorems

De Morgan's Laws

Suitable Grade Level

Grades 9-10