A) 120
B) ?120
C) 52
D) 128
Correct Answer: A
Solution :
\[f(x)={{x}^{4}}-62{{x}^{2}}+ax+9\] For maxima, \[f'(x)=4{{x}^{3}}-124x+a=0\] At \[x=1,\,4{{(1)}^{3}}-124(1)+a=0\Rightarrow a=120\].You need to login to perform this action.
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