1.

If A = {4,5,6} ; B = { 7,8} then show that A union B = B union A.​

Answer»

5,6} ; B = { 7,8}AUB ={4,5,6}U{ 7,8} = {4,5,6,7,8}BUA = {7,8}U{4,5,6} = {4,5,6,7,8}THUS, AUB = BUA


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