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If at each point of the curve y=x^3-a x^...

If at each point of the curve `y=x^3-a x^2+x+1,` the tangent is inclined at an acute angle with the positive direction of the x-axis, then

A

`agt0`

B

`alesqrt3`

C

`-sqrt3lealesqrt3`

D

none of these

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The correct Answer is:
C
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CENGAGE-APPLICATION OF DERIVATIVES-Exercise (Single)
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