mathmath333
  • mathmath333
If A × B ={(p, q),(p, r), (m, q), (m, r)}, find A and B.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
i can help you if you help me
anonymous
  • anonymous
with some math
amistre64
  • amistre64
define 'and'

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More answers

amilapsn
  • amilapsn
This is just using the definition of the Cartesian product of sets
mathmath333
  • mathmath333
define and ??
amistre64
  • amistre64
define AnB? or define the set A, and define the set B?
amilapsn
  • amilapsn
I think here and isn't mathematical \(\cap\)
amistre64
  • amistre64
the set "A and B" is ambiguous
mathmath333
  • mathmath333
answer is given as A = set of first elements = {p, m} B = set of second elements = {q, r}. i dont know how that came ?
amistre64
  • amistre64
stack the ordered pairs, A is on the left, and B is on the right by definition of their cross operation
amistre64
  • amistre64
youll see that A has 2 elements, and B has 2 elements ...
amilapsn
  • amilapsn
It's just definition of catesian product of sets dr
mathmath333
  • mathmath333
yes but how to see that in reverse
amilapsn
  • amilapsn
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCEQFjAA&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FCartesian_product&ei=FKBoVanBKsyVuASM1oKYBQ&usg=AFQjCNGZcA5T5TJS-eGWS8_AQjsHtUXHDQ&sig2=pTO2jFx0NEbfCAsdU3BetA&bvm=bv.94455598,d.c2E
mathmath333
  • mathmath333
ok
amilapsn
  • amilapsn
(y)
mathmath333
  • mathmath333
m still confused
amilapsn
  • amilapsn
Just take A={1,2,3} and B={4,5,6} for instance...
amilapsn
  • amilapsn
k?
amilapsn
  • amilapsn
then what would A x B be?
amilapsn
  • amilapsn
By observing that you'll be able to figure out the reverse.... Cheers!!

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