My question to you is-

         If A and B are two sets such that A union B = A intersection B, then prove that A=B.

Asked by Iffat Sultana | 19th Apr, 2014, 06:05: PM

Expert Answer:

A union B equals A intersection B  rightwards double arrow open curly brackets x : x element of A space o r space x element of B close curly brackets equals open curly brackets x : x element of A space a n d space x element of B close curly brackets  rightwards double arrow A equals B space  o r A union B equals A intersection B  rightwards double arrow open curly brackets x : x element of A space o r space x element of B close curly brackets equals open curly brackets x : x element of A space a n d space x element of B close curly brackets  rightwards double arrow A equals B space  o r
 

Answered by  | 20th Apr, 2014, 12:23: AM

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