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If A=1,2,3,4,...

Question

If A={1,2,3,4,5} , B={3,4,7,8} then find $A \cup B$ and $A \cap B$ .

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Solution

$A = {1, 2, 3, 4, 5}$

$B = {3, 4, 7, 8}$

$A \cup B = {1, 2, 3, 4, 5, 7, 8}$

$A \cap B = {3, 4}$ .

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