Hàm số \(y = \left| {x + 1}...

Câu hỏi: Hàm số \(y = \left| {x + 1} \right| + \left| {x - 3} \right|\) được viết lại là:

A. \(y = \left\{ \begin{array}{l} - 2x + 2\,\,\,\,khi\,\,\,\,x \le - 1\\4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\,\, - 1 < x \le 3\\2x - 1\,\,\,\,\,\,\,khi\,\,\,\,x > 3\end{array} \right.\)

B. \(y = \left\{ \begin{array}{l}2x - 2\,\,\,\,\,\,\,khi\,\,\,\,x \le - 1\\4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\, - 1 < x \le 3\\ - 2x + 2\,\,\,khi\,\,\,x > 3\end{array} \right.\)

C. \(y = \left\{ \begin{array}{l}2x + 2\,\,\,\,\,\,\,\,khi\,\,\,\,x \le - 1\\4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\, - 1 < x \le 3\\ - 2x - 2\,\,\,\,khi\,\,\,\,\,x > 3\end{array} \right.\)

D. \(y = \left\{ \begin{array}{l} - 2x + 2\,\,\,\,khi\,\,\,x \le - 1\\4\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,khi\,\,\,\, - 1 < x \le 3\\2x - 2\,\,\,\,\,\,khi\,\,\,\,x > 3\end{array} \right.\)