Kitten_is_back
  • Kitten_is_back
Which sets of numbers are closed under division? Choose all answers that are correct. A. rational numbers B. integers C. {–1, 0, 1} D. whole numbers
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Kitten_is_back
  • Kitten_is_back
i got a d
EmmaTassone
  • EmmaTassone
When you say whole number you mean the real numbers? Actually I think the answer is A.rational numbers and could be too D.whole number if you mean real numbers
EmmaTassone
  • EmmaTassone
I think letter B isnt right because division is not defined in integer numbers. For example: if we take two integer numbers 2 and 3 and then we divide them \[\frac{ 2 }{ 3 }\notin \mathbb{Z}^+ and \frac{ 2 }{ 3 }\notin \mathbb{Z}^-\] So division isnt closed for integers.

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EmmaTassone
  • EmmaTassone
And finally letter C is closed too (always saying that the division is not defined by zero) because every number in the set has inverse (-1,1) so division (multiplication of the inverse) is defined and closed. As you can see: 1/-1=-1 -1/1=1 1/1=1 -1/-1=1 0/1=0/-1=0

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