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aminita

  • 3 years ago

If A = {positive integers} and B = {…,−4, −3, −2, −1} what is A ∩ B?

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  1. stgreen
    • 3 years ago
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    empty set

  2. hartnn
    • 3 years ago
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    ∩ means elements which are "common" to those sets.

  3. hartnn
    • 3 years ago
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    which elements are common to A and B ?

  4. inkyvoyd
    • 3 years ago
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    ∩ is called the intersection. Think of it as the center of a venn diagram.

  5. aminita
    • 3 years ago
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    the options they give me are... { } {…, −3, −2, −1, 1, 2, 3, …} {1, 2, 3, 4, …} {…−3, −2, −1}

  6. inkyvoyd
    • 3 years ago
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    Look at what hartnn and I have said. What do you think the answer is?

  7. stgreen
    • 3 years ago
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    @aminita first one is true....since there is nothing common between these two sets you see

  8. aminita
    • 3 years ago
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    yes that is the answer choice i picked but it said it was wrong...

  9. aminita
    • 3 years ago
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    there are no common integers that will fit within bity of these sets that is why i picked it but my teacher marked it wrong :/

  10. inkyvoyd
    • 3 years ago
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    take a screenshot of the problem and contact your teacher.

  11. stgreen
    • 3 years ago
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    yeah your teacher is just violating the very basic concept of sets

  12. aminita
    • 3 years ago
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    okay thank you all for your help peeps!;)

  13. stgreen
    • 3 years ago
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    welcom kid

  14. aminita
    • 3 years ago
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    (y)

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