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" If "tan^(-1)x+tan^(-1)y=(pi)/(4),xy<1"...

" If "tan^(-1)x+tan^(-1)y=(pi)/(4),xy<1" then write the value of "x+y+xy

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If tan^(-1)x+tan^(-1)y=(pi)/(4) , and the value of xy<1 ,then show that x+y+xy=1 .

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