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1.	If , then
A.	\[f'(x)=0and\,f''(x)=0\]has one common root
B.	\[f(x)=0\,\,and\,f'(x)=0\]has one common root
C.	sum of roots of \[f(x)\]=0 is \[-\,3\,a\]
D.	none of these
Answer» C. sum of roots of \[f(x)\]=0 is \[-\,3\,a\]

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If , then

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