xcganeyTpJ xcganeyTpJ
  • 24-11-2016
  • Mathematics
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If A=B prove AUB=AnB

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syed514
syed514 syed514
  • 26-11-2016
if two sets are same let a and bthen we can say a= b
according to definition of intersection it is function that contains common enements from both setsas a=b so all elemnts are commonso a= a n bor b = a n b
in union the function has all elements of both sets and in set no element repeats so 
a u b = aor a u b = b
as a u b  = a or b and a n b = a or b so we can conclude here that
a u b = a n b as a = b // defined above
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