96mertcank96
  • 96mertcank96
given A = {2,3,5,7,8} and B = {3,5,8,9} What is A U B?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
358 easy men
96mertcank96
  • 96mertcank96
how did you get that answer?
anonymous
  • anonymous
comon sense?

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96mertcank96
  • 96mertcank96
yes but there must be a mathematical technique you used to get the answer
anonymous
  • anonymous
no just common sense
anonymous
  • anonymous
trust me men simple
anonymous
  • anonymous
why i think i chose them answers?
anonymous
  • anonymous
use comon sense look at hte numbers
anonymous
  • anonymous
and thats ur answer
96mertcank96
  • 96mertcank96
yeah but i need to explain how i got the answer and i cant write used common sense????? that would make your statement invalid to me
anonymous
  • anonymous
u must fail at math if u have no common sense
96mertcank96
  • 96mertcank96
i have no answer choice as 3,5,8 and thank you for being civilized and kindhearted -_-
inkyvoyd
  • inkyvoyd
Oh yeah, now you hav TWO ignorant people
inkyvoyd
  • inkyvoyd
A = {2,3,5,7,8} and B = {3,5,8,9}|dw:1364782794558:dw|
inkyvoyd
  • inkyvoyd
find what's in the center. That is what the Union symbol means.
96mertcank96
  • 96mertcank96
3,5,and 8
96mertcank96
  • 96mertcank96
yes but i have no answer choice like that whatsoever
inkyvoyd
  • inkyvoyd
that's cause that's the intersection.
inkyvoyd
  • inkyvoyd
My bad. The union is the concatenation of the two
96mertcank96
  • 96mertcank96
yes wouldnt that be the middle?
inkyvoyd
  • inkyvoyd
A = {2,3,5,7,8} and B = {3,5,8,9} join the two sets together and take out repeats
96mertcank96
  • 96mertcank96
3 and 5 then that would explain it...
96mertcank96
  • 96mertcank96
and 8
inkyvoyd
  • inkyvoyd
No. {2,3,5,7,8}U{3,5,8} is {2,3,5,7,8}
inkyvoyd
  • inkyvoyd
http://en.wikipedia.org/wiki/Union_%28set_theory%29
inkyvoyd
  • inkyvoyd
I'm sorry what I said before is the intersection.
96mertcank96
  • 96mertcank96
i have no answer choice like that i have {5} {5,8} {2,3,4,7,9} {2,3,4,5,7,8,9}
inkyvoyd
  • inkyvoyd
http://en.wikipedia.org/wiki/Union_%28set_theory%29
inkyvoyd
  • inkyvoyd
Read this article. You will findwhat you seek. My first venn diagram image and the answer obtained from that is incorrect. You must put the two sets together and take out repeats.
96mertcank96
  • 96mertcank96
yes i know ive read it but my answer choices make that article invalid...
inkyvoyd
  • inkyvoyd
yeah, well can't help you there. The answer should be what agrees with that wiki article.
96mertcank96
  • 96mertcank96
you can never trust Wiki...
inkyvoyd
  • inkyvoyd
Well, I'm as worthy of trust as wiki. The wiki math articles have yet to fail me. If you don't want to read wiki, just google union set theory and see if what you get disagrees.
96mertcank96
  • 96mertcank96
yeah aint nobody got time for that so thank you for your help!
inkyvoyd
  • inkyvoyd
np :)

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