If x^(2)+y^(2)=t+t^(-1),x^(4)+y^(4)=t^(2...

If `x^(2)+y^(2)=t+t^(-1),x^(4)+y^(4)=t^(2)+t^(-2)," then " yy_(1)=`

A

`x^(-2)`

B

`-x^(-3)`

C

`x^(-1)`

D

`-x^(-1)`

Verified by Experts

The correct Answer is:

B

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