A) \[1\]
B) \[2\]
C) \[3\]
D) 4
Correct Answer: B
Solution :
[b] Let \[g(x)=f(x)-\sin {{x}^{2}}\] According to the question, we have \[g(1)=g(2)=g(3)=0\] \[\Rightarrow \,\,\,\,\,g'(x)=0\] at least twice \[\Rightarrow \,\,\,\,\,\,\,f'(x)=2x\,\,\cos x\] at least twice.You need to login to perform this action.
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