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

If at each point of the curve \[y={{x}^{3}}-a{{x}^{2}}+x+1,\]the tange

1.	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.	\[a>0\]
B.	\[a\le \sqrt{3}\]
C.	\[-\sqrt{3}\le a\le \sqrt{3}\]
D.	None of these
Answer» D. None of these

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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

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