Find the union and intersection of $A=\{1,2,3,4,5\}$ and $B=\{2,7,5,10,100\}$.

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Lesson Parent: 
The Union and Intersection of Sets
Problem: 

Find the union and intersection of $A=\{1,2,3,4,5\}$ and $B=\{2,7,5,10,100\}$.

Answer: 

$A\cup B=\{1,2,3,4,5,7,10,100\}$ and $A\cap B=\{2,5\}$

SAMPLE SOLUTION

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Solution: 

First, the union of $A$ and $B$ is the set

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Therefore,

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The intersection of $A$ and $B$ is the set

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Since the only two elements that are in both $A$ and $B$ are $2$ and $5$ we have

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