Answers

2014-06-11T13:55:08+05:30
A={1,2,3,4}
B={3,4,5,6}
since A U B={1,2,3,4,5,6}
also B U A={1,2,3,4,5,6}
hence A U B= B U A
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2014-06-11T14:09:59+05:30
Here A={1,2,3,4}
and  B={3,4,5,6}

hence A U B = {1,2,3,4,5,6}

similarly B U A={1,2,3,4,5,6}

hence proved


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