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let
A={1,2} b={3,4}
if AUB=C
Then C={1,2,3,4}
A∩B=∅ as there is no common elements
to prove that C-B=A
C-B=A
{1,2,3,4} - {3,4} = {1,2}
{1,2}={1,2}
it is proved that A=C-B
A={1,2} b={3,4}
if AUB=C
Then C={1,2,3,4}
A∩B=∅ as there is no common elements
to prove that C-B=A
C-B=A
{1,2,3,4} - {3,4} = {1,2}
{1,2}={1,2}
it is proved that A=C-B
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