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# set theory

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If we define the following two sets:
A = {1, 2, 3, 4, 5}
B = {5, 6, 7, 8, 9}
What are the following:
A - B?
A union B? (The union of A and B)
A intersect B? (The intersect of A and B)

##### Solution Summary

This job applies set theory. The subtraction, union and intersection is examined.

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A - B = {1, 2, 3, 4}

We take set A and remove any elements from it that are found in set B. In this case, the ...

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