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The abscissa of the points, where the ta...

The abscissa of the points, where the tangent to curve `y=x^(3)-3x^(2)-9x+5` is parallel to X-axis are

A

x = 0

B

x = 1 and `-1`

C

x = 1 and `-3`

D

`x = -1` and 3

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The correct Answer is:
D
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