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The tangent to the curve y^(2)-xy+9=0 is...

The tangent to the curve `y^(2)-xy+9=0` is vertical when ……………… .

A

`y=0`

B

`y=pmsqrt3`

C

`y=(1)/(2)`

D

`y=pmsqrt3`

Text Solution

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The correct Answer is:
C
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