sets,subsets

Asked by topperswati | 2nd Jan, 2010, 10:19: PM

Expert Answer:

Let a  (Z-Y)

a  Z   and   a  Y

So a  Z    and a  X  (since X  Y)

so a  (Z-X)

Hence, (Z-Y)   (Z-X).

 

Answered by  | 4th Jan, 2010, 10:43: AM

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