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Mathematics 13 Online
OpenStudy (anonymous):

Find the union of the two sets A = {1, 5, 8, 12, 17} and B = {5, 17}. (Points : 1) {1, 5, 17} {1, 5, 8, 12, 17} {5, 17} {17}

OpenStudy (nincompoop):

what is the definition of UNION of sets?

OpenStudy (anonymous):

Yes to solve this question you need to know what the word Union actually means in terms of mathematics.

OpenStudy (anonymous):

Union of two sets The union of two sets is everything in both sets. For example if you have the set {3,4,5} and the set {5,6,7}, then the union of these two sets is {3,4,5,6,7}. The symbol for union is a capital U. Courtsey of Google :P

OpenStudy (anonymous):

ALL the elements in set A combined with all the elements in set B. Example:When A={1,2,3,4} and B={2,3,6} The union of Sets A and B would be: {1,2,3,4,6} , because both sets contain those numbers.

OpenStudy (anonymous):

precisely :)

OpenStudy (anonymous):

is the answer 5 and 17

OpenStudy (anonymous):

no try again, look at the example you just posted.

OpenStudy (anonymous):

is it 17

OpenStudy (anonymous):

No, it is the second option because as you said "Union" is defined by ALL the elements in set A combined with all the elements in set B.

OpenStudy (anonymous):

Do you understand?

OpenStudy (anonymous):

yes thank you

OpenStudy (anonymous):

sorry , yes, had just answered a couple intersection questions... apologies

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