1003230206

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Project ID: 
1003230206
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1
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Which of the statements A, B, C, D given bellow are incorrect? \[ \begin{array}{l} \text{A: }\left(\ln\frac x2\right)'=\frac1x,\ x\in\mathbb{R}^+ \\ \text{B: }\left(5\sin⁡3x\right)'=5\cos⁡3x \\ \text{C: }\left(\frac1{\left(x^3-1\right)^2}\right)'=\frac{-6x^2}{\left(x^3-1\right)^3},\ x\in\mathbb{R}\setminus\{1\} \\ \text{D: }\left(\ln⁡(1+\cos⁡ x ) \right)'=\frac1{1-\sin ⁡x},\ x\neq\frac{\pi}2+2k\pi,\ k\in\mathbb{Z} \end{array}\] The only incorrect statements are:
B, D
A, B, D
B, C
B
A, C
A, C, D