Can someone help me? No direct answers please!!

What is the union of the two sets A={2,3,6,11,16} and B={6,11}?
a.) {2,3,6,11,16}
b.) {2,3,16}
c.) {6,11}
d.) {16}

(Also I have no idea what any of this is or means.)

Question

Can someone help me? No direct answers please!!

What is the union of the two sets A={2,3,6,11,16} and B={6,11}? 
a.) {2,3,6,11,16}
b.) {2,3,16}
c.) {6,11}
d.) {16}

(Also I have no idea what any of this is or means.)

welshfella · Answer

the union consists of all the elements in sets A and B ( with no duplicates)

ondinana · Answer

By elements do you mean the numbers in a set q.q

welshfella · Answer

yes

ondinana · Answer

So if it's "all" elements, it's all the numbers in both sets combined?

welshfella · Answer

an example would be union of A {1,2,3} and  B{1,4,5}  =  {1,2,3,4,5}

welshfella · Answer

note that I only include 1 once.

ondinana · Answer

OH okay. Cool. So then it would be 'a', because it contains all the elements and doesn't repeat any?

welshfella · Answer

correct

ondinana · Answer

Thank you!!

welshfella · Answer

its usuually  written A U B

welshfella · Answer

U = union   yw