If \[f(x)={{x}^{3}}-6{{x}^{2}}+9x+3\] be a decreasing function, then x lies in [RPET 2002]

\[(-\infty ,-1)\cap (3,\,\infty )\]

If \[f(x)={{x}^{3}}-6{{x}^{2}}+9x+3\] be a decreasing function, then x

1.	If \[f(x)={{x}^{3}}-6{{x}^{2}}+9x+3\] be a decreasing function, then x lies in [RPET 2002]
A.	\[(-\infty ,-1)\cap (3,\,\infty )\]
B.	\[(1,\,\,3)\]
C.	\[(3,\,\,\infty )\]
D.	None of these
Answer» C. \[(3,\,\,\infty )\]

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If \[f(x)={{x}^{3}}-6{{x}^{2}}+9x+3\] be a decreasing function, then x lies in [RPET 2002]

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