CBSE Class 11-science Answered
SETS
Asked by | 28 Jun, 2008, 12:15: PM
Expert Answer
For A =B AB and BA
For AB
Let a be an element in A.
To show: ‘a B
a A⇒a AX = BX (given)
a BX
aB or aX if aB then AB
If aX and as aA then a A X = BX = Φ
aB or aX if aB then AB
If aX and as aA then a A X = BX = Φ
using the intersection properties
So a cannot be in X
hence AB
Similarly by the symmetric argument BA
Answered by | 30 Jun, 2008, 10:15: AM
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