A) \[\pi \]
B) \[\pi /2\]
C) \[2\pi \]
D) zero
Correct Answer: A
Solution :
Use \[{{c}_{2}}\to {{c}_{2}}+2\cos x\,\,{{c}_{3}}\]\[\Rightarrow \]\[f\,(x)=2\]\[\Rightarrow \]\[f'\,(x)=0\]You need to login to perform this action.
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