Q. 6 B4.7( 13 Votes )

For three sets A,

Answer :

Given: A B


To show: C–B C–A


Let x ϵ C– B


x ϵ C and x B [by definition C–B]


x ϵ C and x A


x ϵ C–A


Thus x ϵ C–B x ϵ C–A. This is true for all x ϵ C–B.


C – B C – A.


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