GreenGalaxy
  • GreenGalaxy
So, I have a question from a test I took and got a 80% on it, apparently I missed this question For which operations is the set {0, 1} closed? A. Multiplication B. Division C. Addition D. Subtraction I picked A but the correct answers were A and B Why division? You can't divided 0 by 0? right?
Mathematics
jamiebookeater
  • jamiebookeater
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GreenGalaxy
  • GreenGalaxy
anonymous
  • anonymous
well technically 0 divided by 0 is 0...
GreenGalaxy
  • GreenGalaxy
But, in the lesson they specifically said you can't do that.

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GreenGalaxy
  • GreenGalaxy
GreenGalaxy
  • GreenGalaxy
whpalmer4
  • whpalmer4
@mrqueest 0 / 0 is NOT 0 For all values of \(a,b,c\), if \[a/b = c\] then \[c*b =a\] Does that work for \(a/0=0\)? \[3/0 = 0\]means that \[0*0 = 3\]but it isn't.
GreenGalaxy
  • GreenGalaxy
Oh! Wow, thank you! I wouldn't have gotten this at all! Thanks!
whpalmer4
  • whpalmer4
My guess is that division was included with the understanding that division by 0 is excluded because it gives an undefined result.
GreenGalaxy
  • GreenGalaxy
I gave you a medal, also im closing this session, thanks a ton!
anonymous
  • anonymous
yes green?
GreenGalaxy
  • GreenGalaxy
It's alright my question is already awnserd.Thanks anyways
anonymous
  • anonymous

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