anonymous
  • anonymous
Select all of the following true statements if R = real numbers, I = integers, and N = {1, 2, ...}. -> ∅⊂R -> 0∈I -> R⊂N -> N⊂I -> {1, 2, ...}⊆N -> -4∈N
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
empty set is subset of any set integers contain all positive and negative integers including 0 so 0 does belong in them R is much bigger than N, in fact R is uncountable and N is countable, so R can't be a subset of N Integers contain positive integers which are essentially the natural numbers, so N is a subset of I also {1,2,...} is a subset of N since its N itself -4 doesnt belong in N since N doesnt contain any negative numbers
nincompoop
  • nincompoop
what have you tried? http://www.kiraportfolio.com/uploads/5/4/9/0/5490072/9958354.jpg?517
anonymous
  • anonymous
I was confused about what the different signs meant, but I'm more familiar with them now. Thanks for both of your time. :)

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nincompoop
  • nincompoop
http://tedsider.org/teaching/st/st_notes.pdf
anonymous
  • anonymous
so if it asks Find A U B if A = {3, 6, 9, 12} and B = {2, 4, 6, 8, 10}. It would be {6} because U = the set of things that are in at least one member of A. Right?
nincompoop
  • nincompoop
http://www.youtube.com/watch?v=En8fI2ixepo
anonymous
  • anonymous
A U B from A = {3, 6, 9, 12} and B = {2, 4, 6, 8, 10} would be {2, 3, 4, 6, 9, 12} and A n B from A = {3, 6, 9, 12} and B = {2, 4, 6, 8, 10} would be {6} Thanks for you links. :)
anonymous
  • anonymous
your*
nincompoop
  • nincompoop
∪ = union ∩ = intersection

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