Question 565199: If set A= {3,4,5,6,7} and set B= {1,2,3,4}: (a) What is AUB? (b) What is A(upside down U)B? Someone please help, I'm so confused.
Thanks
Answer by KMST(5396)   (Show Source):
You can put this solution on YOUR website! The U stands for union, meaning a set that has all the elements of both united sets.
AUB={1,2,3,4,5,6,7}
The upside down U means intersection, meaning the set of elements common to both sets. The intersection of A and B is {3,4}.
 The red circle represents set A. The blue circle represents set B.
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