if x^2+y^2 = t - 1/t and x^4 + y^4 = t^2...

if `x^2+y^2 = t - 1/t` and` x^4 + y^4 = t^2 + 1/t^2 `then prove that `dy/dx = 1/(x^3y)`

A

`(y)/(x) `

B

`(-y)/(x) `

C

` (x)/(y) `

D

` (-x)/(y) `

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The correct Answer is:

B

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