Cho hàm số $f(x)=\sqrt{\cos 2x}$. Khi đó
A.$\text{d}\left[ f\left( x \right) \right]=\dfrac{-\sin 2x}{2\sqrt{\cos 2x}}\text{d}x$.
B.$\text{d}\left[ f\left( x \right) \right]=\dfrac{\sin 2x}{2\sqrt{\cos 2x}}\text{d}x$.
C.$\text{d}\left[ f\left( x \right) \right]=\dfrac{\sin 2x}{\sqrt{\cos 2x}}\text{d}x$.
D.$\text{d}\left[ f\left( x \right) \right]=\dfrac{-\sin 2x}{\sqrt{\cos 2x}}\text{d}x$.
A.$\text{d}\left[ f\left( x \right) \right]=\dfrac{-\sin 2x}{2\sqrt{\cos 2x}}\text{d}x$.
B.$\text{d}\left[ f\left( x \right) \right]=\dfrac{\sin 2x}{2\sqrt{\cos 2x}}\text{d}x$.
C.$\text{d}\left[ f\left( x \right) \right]=\dfrac{\sin 2x}{\sqrt{\cos 2x}}\text{d}x$.
D.$\text{d}\left[ f\left( x \right) \right]=\dfrac{-\sin 2x}{\sqrt{\cos 2x}}\text{d}x$.
Loga
Hóa Học lớp 12
