cho hai đường thẳng d : d : y = -6-x và d1 : y = 2x - 4 a) vẽ hai đường thẳng d và d1 trên cùng một mặt phẳng tọa độ Oxy. b) xác định hàm số y = a1x + b1 biết đồ thị của hàm số đã cho song song với đường thẳng d : y = -6 -x và đi qua điểm A(-2,-1)
1 trả lời
67 Tham khảo câu trả lời từ Trợ lý ảo Lazi a) Vẽ hai đường thẳng d : y = -6 - x và d1 : y = 2x - 4 trên cùng một mặt phẳng tọa độ Oxy: \[ \begin{array}{c} \text{Đường thẳng d:} y = -6 - x \\ \text{Đường thẳng d1:} y = 2x - 4 \end{array} \] \[ \begin{array}{|c|c|c|} \hline x & y_d = -6 - x & y_{d1} = 2x - 4 \\ \hline -4 & -2 & -12 \\ -3 & -3 & -10 \\ -2 & -4 & -8 \\ -1 & -5 & -6 \\ 0 & -6 & -4 \\ 1 & -7 & -2 \\ 2 & -8 & 0 \\ \hline \end{array} \] Vẽ đồ thị: \[ \begin{array}{c} \text{Đường thẳng d (màu xanh): y = -6 - x} \\ \text{Đường thẳng d1 (màu đỏ): y = 2x - 4} \end{array} \] \[ \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} \begin{array}{c} 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