A) 0
B) 1
C) 2
D) 3
Correct Answer: C
Solution :
\[f(x)=2{{x}^{3}}-3(k+2){{x}^{2}}+12kx-7,\] \[-4\le k\le 6,k\in I\] \[f'(x)=6({{x}^{2}}-(k+2)x+2k)\] \[f'(x)=6(x-k)(x-2)\] for \[f(x)\] to be invertible, ?k? must be ?2? only. Ans.You need to login to perform this action.
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