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mathmath333

  • one year ago

If A × B ={(p, q),(p, r), (m, q), (m, r)}, find A and B.

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  1. anonymous
    • one year ago
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    i can help you if you help me

  2. anonymous
    • one year ago
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    with some math

  3. amistre64
    • one year ago
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    define 'and'

  4. amilapsn
    • one year ago
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    This is just using the definition of the Cartesian product of sets

  5. mathmath333
    • one year ago
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    define and ??

  6. amistre64
    • one year ago
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    define AnB? or define the set A, and define the set B?

  7. amilapsn
    • one year ago
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    I think here and isn't mathematical \(\cap\)

  8. amistre64
    • one year ago
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    the set "A and B" is ambiguous

  9. mathmath333
    • one year ago
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    answer is given as A = set of first elements = {p, m} B = set of second elements = {q, r}. i dont know how that came ?

  10. amistre64
    • one year ago
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    stack the ordered pairs, A is on the left, and B is on the right by definition of their cross operation

  11. amistre64
    • one year ago
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    youll see that A has 2 elements, and B has 2 elements ...

  12. amilapsn
    • one year ago
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    It's just definition of catesian product of sets dr

  13. mathmath333
    • one year ago
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    yes but how to see that in reverse

  14. mathmath333
    • one year ago
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    ok

  15. amilapsn
    • one year ago
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    (y)

  16. mathmath333
    • one year ago
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    m still confused

  17. amilapsn
    • one year ago
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    Just take A={1,2,3} and B={4,5,6} for instance...

  18. amilapsn
    • one year ago
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    k?

  19. amilapsn
    • one year ago
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    then what would A x B be?

  20. amilapsn
    • one year ago
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    By observing that you'll be able to figure out the reverse.... Cheers!!

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