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B
False
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Solution
The correct option is A True L.H.S. =11+xa−b+11+xb−a =1+xb−a+1+xa−b(1+xa−b)(1+xb−a) =1+xb−a+1+xa−b(1+xb−a+xa−b+(xa−b)(xb−a)) =1+xb−a+1+xa−b(1+xb−a+xa−b+(xa−b+b−a)) =1+xb−a+1+xa−b(1+xb−a+xa−b+1) =1 =R.H.S.