

vẽ đồ thị hàm số
a, [tex]a, 3\left |x-1 \right |-\left | 2x-2 \right | b,\left | x \right |+\left | x-1 \right |+\left | x-2 \right | [tex]c, y=\left |-x-3 \right |+\left | 2x+1 \right |+\left | x+1 \right |[/tex][/tex]
a, [tex]a, 3\left |x-1 \right |-\left | 2x-2 \right | b,\left | x \right |+\left | x-1 \right |+\left | x-2 \right | [tex]c, y=\left |-x-3 \right |+\left | 2x+1 \right |+\left | x+1 \right |[/tex][/tex]