+ х- у х -у Jx- Jy Tx + Jy 2/xy Nх ...
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+ х- у х -у Jx- Jy Tx + Jy 2/xy Nх – ЈУ x + Vу у-х х- у х -у / / + - +

JEE/Engineering Exams
Maths
Solution
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( f=frac{2 sqrt{x y}}{(y-x)} frac{(2 x sqrt{y}-2 y sqrt{y})(x-y)}{(x-y)(2 sqrt{x})} ) ( begin{aligned}=& frac{2 sqrt{x} sqrt{y} operatorname{sen}(x-y)(x+y)}{-(x+1)(x+y) cdot x cdot sqrt{x}} &=-2 y &=frac{0}{x} end{aligned} )
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