K取何整数时,直线y=3x+k+2与直线=-x+2k的交点在第二象限?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 19:10:44
![K取何整数时,直线y=3x+k+2与直线=-x+2k的交点在第二象限?](/uploads/image/z/5479398-54-8.jpg?t=K%E5%8F%96%E4%BD%95%E6%95%B4%E6%95%B0%E6%97%B6%2C%E7%9B%B4%E7%BA%BFy%3D3x%2Bk%2B2%E4%B8%8E%E7%9B%B4%E7%BA%BF%3D-x%2B2k%E7%9A%84%E4%BA%A4%E7%82%B9%E5%9C%A8%E7%AC%AC%E4%BA%8C%E8%B1%A1%E9%99%90%3F)
K取何整数时,直线y=3x+k+2与直线=-x+2k的交点在第二象限?
K取何整数时,直线y=3x+k+2与直线=-x+2k的交点在第二象限?
K取何整数时,直线y=3x+k+2与直线=-x+2k的交点在第二象限?
y=3x+k+2=y=-x+2k
x=(k-2)/4
y=-x+2k=-(k-2)/4+2k
第二象限x0
x=(k-2)/4-2/7
-2/7