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Question

State whether the statement is True or False.
11+xa−b+11+xb−a=1

A
True
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B
False
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Solution

The correct option is A True
L.H.S. =11+xab+11+xba
=1+xba+1+xab(1+xab)(1+xba)
=1+xba+1+xab(1+xba+xab+(xab)(xba))
=1+xba+1+xab(1+xba+xab+(xab+ba))
=1+xba+1+xab(1+xba+xab+1)
=1
=R.H.S.

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