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# If xyz=1 then find (1+x+y−1)−1+(1+y+z−1)+(1+z+x−1)-1

11th - 12th Class

Maths

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$xyz=1,\frac{3}{1}=\frac{1}{xy},\frac{1}{z}=xy\phantom{\rule{0ex}{0ex}}{(1+x+y}^{}$

124

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