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The slope of tangent at any point (x, y)...

The slope of tangent at any point `(x, y)` on a curve `y= y(x)` is ,`(x^2+y^2)/(2xy) , x gt 0`.If `y(2)=0`, then a value of `y(8)` is

A

`-2sqrt3`

B

`4sqrt3`

C

`2sqrt3`

D

`-4sqrt2`

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