v If \[y=a\,\,\log x+b{{x}^{2}}+x\]has its extremum value at \[x=1\]and \[x=2,\]then \[(a,b)\]= [UPSEAT 2002]

\[\left( 1,\,\,\frac{1}{2} \right)\]

\[\left( \frac{1}{2},\,2 \right)\]

\[\left( 2,\,\,\frac{-1}{2} \right)\]

\[\left( \frac{-2}{3},\,\,\frac{-1}{6} \right)\]

v If \[y=a\,\,\log x+b{{x}^{2}}+x\]has its extremum value at \[x=1\]an

1.	v If \[y=a\,\,\log x+b{{x}^{2}}+x\]has its extremum value at \[x=1\]and \[x=2,\]then \[(a,b)\]= [UPSEAT 2002]
A.	\[\left( 1,\,\,\frac{1}{2} \right)\]
B.	\[\left( \frac{1}{2},\,2 \right)\]
C.	\[\left( 2,\,\,\frac{-1}{2} \right)\]
D.	\[\left( \frac{-2}{3},\,\,\frac{-1}{6} \right)\]
Answer» E.

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v If \[y=a\,\,\log x+b{{x}^{2}}+x\]has its extremum value at \[x=1\]and \[x=2,\]then \[(a,b)\]= [UPSEAT 2002]

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