If \[x=a\left( t-\frac{1}{t} \right)\,,y=a\] \[\left( t+\frac{1}{t} \right)\]then \[\frac{dy}{dx}=\] [Karnataka CET 2004]

If \[x=a\left( t-\frac{1}{t} \right)\,,y=a\] \[\left( t+\frac{1}{t} \r

1.	If \[x=a\left( t-\frac{1}{t} \right)\,,y=a\] \[\left( t+\frac{1}{t} \right)\]then \[\frac{dy}{dx}=\] [Karnataka CET 2004]
A.	\[\frac{y}{x}\]
B.	\[\frac{-y}{x}\]
C.	\[\frac{x}{y}\]
D.	\[\frac{-x}{y}\]
Answer» D. \[\frac{-x}{y}\]