Ta có: `f'(x) = 0`

`=> [(x = 0),((x - 2)^{3} = 0):}`

`<=> [(x = 0),(x = 2):}`

BBT:

$\color{#FA8072}{\text{___}}$ $\color{#F28D84}{\text{___}}$ $\color{#EFAE98}{\text{___}}$ $\color{#E7C2AB}{\text{___}}$ $\color{#DFD6BF}{\text{___}}$ $\color{#D7E9D3}{\text{___}}$ $\color{#CFFDD7}{\text{___}}$ $\color{#C7FBEA}{\text{___}}$ $\color{#BFF9FE}{\text{___}}$ $\color{#B7F8F7}{\text{___}}$ $\color{#AFF6EC}{\text{___}}$ $\color{#A7F5DF}{\text{___}}$ $\color{#9FF3D2}{\text{___}}$ $\color{#97F2C5}{\text{___}}$ $\color{#8FF1B9}{\text{___}}$ $\color{#87F0AC}{\text{___}}$ $\color{#7FEFA0}{\text{___}}$ $\color{#77ED93}{\text{___}}$

(Hình ảnh)

$\color{#FA8072}{\text{___}}$ $\color{#F28D84}{\text{___}}$ $\color{#EFAE98}{\text{___}}$ $\color{#E7C2AB}{\text{___}}$ $\color{#DFD6BF}{\text{___}}$ $\color{#D7E9D3}{\text{___}}$ $\color{#CFFDD7}{\text{___}}$ $\color{#C7FBEA}{\text{___}}$ $\color{#BFF9FE}{\text{___}}$ $\color{#B7F8F7}{\text{___}}$ $\color{#AFF6EC}{\text{___}}$ $\color{#A7F5DF}{\text{___}}$ $\color{#9FF3D2}{\text{___}}$ $\color{#97F2C5}{\text{___}}$ $\color{#8FF1B9}{\text{___}}$ $\color{#87F0AC}{\text{___}}$ $\color{#7FEFA0}{\text{___}}$ $\color{#77ED93}{\text{___}}$

Vậy hàm số nghịch biến trên khoảng `(0;2)`

`-> C. (0;1)`

$\color{#FA8072}{\text{$\textit{$\circ$ hungnguyen4269}$}}$