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If x^(2)+y^(2)=t+(1)/(t) "and" x^(4)+y^(...

If `x^(2)+y^(2)=t+(1)/(t) "and" x^(4)+y^(4)=t^(2)+(1)/(t^2), "then" (dy)/(dx)` is equal to

A

`-(x)/(y)`

B

`-(y)/(x)`

C

`(x^2)/(y^2)`

D

`(y^2)/(x^2)`

Text Solution

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The correct Answer is:
B
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