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Slope of normal of a curve y=y(x) "is" x...

Slope of normal of a curve `y=y(x) "is" x^2/(xy-x^2y^2-1)` passes through `(1,1)` then find the value of `ey(e)`

A

`(1+tan1)/(1-tan1)`

B

1

C

`tan1`

D

`(1-tan1)/(1+tan1)`

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