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The point(s) on the curve y^(3)+3x^(2)=1...

The point(s) on the curve `y^(3)+3x^(2)=12y`, where the tangent is vertical, is (are) :

A

`(+- 4/sqrt3,0)`

B

`(+-sqrt((11)/(3)),1)`

C

(0,0)

D

`(+- 4/sqrt3,2)`

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The correct Answer is:
D
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