If x= a(t-1/t), y=a(t+1/t), then dy/dx ...

If `x= a(t-1/t), y=a(t+1/t)`, then `dy/dx ` =........ A) x/y B) y/x C) -x/y D) -y/x

A

`y/x`

B

`(-y)/x`

C

`x/y`

D

`(-x)/y`.

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