AMU Engineering 2020 solved paper Solved Paper

Section: Mathematics

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Question : 130 of 150

Marks: +1, -0

. If f(x)=a‌log|x|+bx2+x has its extremum values at x=−1 and x=2, then

a=2,b=−1
a=−2,b=‌
1
2
a=2,b=−1∕2
None of these

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