A) 2
B) 1
C) -2
D) -1
Correct Answer: D
Solution :
\[f(-1)\,=f(1)\,\Rightarrow \,b=-2\] (Using Rolle?s theorem) Also \[f'\left( \frac{1}{2} \right)=0\Rightarrow \,a=\frac{1}{2}\]. \[\therefore \,\,\,2a+b=2\left( \frac{1}{2} \right)\,+(-2)\,=-1\]You need to login to perform this action.
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