Question

Find A UB and An B and A - B.
If A = {a, b, c, d} and B = {c, d}.​

Answer 1

Answer:

A={a,b,c,d}

B={c,d}

A U B

={a,b,c,d}U{c,d}

={a,b,c,d}

AnB

={a,b,c,d}n{c,d}

={c,d}

A-B

={a,b,c,d}-{c,d}

{a,b}

Answer 2

• A ∪ B = {a , b , c , d}

• A ∩ B = {c , d}

• A - B = {a , b}

Given :

A = {a , b , c , d} and B = {c , d}

To find :

A ∪ B , A ∩ B , A - B

Solution :

Step 1 of 2 :

Write down the given sets

Here the given sets are

A = {a , b , c , d} and B = {c , d}

Step 2 of 2 :

Find A ∪ B , A ∩ B , A - B

A ∪ B

= { x : x ∈ A ∨ x ∈ B }

= {a , b , c , d}

A ∩ B

= { x : x ∈ A ∧ x ∈ B }

= {c , d}

A - B

= { x : x ∈ A ∧ x ∉ B }

= {a , b}

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