如图，在平面直角坐标系内，点O为坐标原点，直线y= 12 x+1与抛物线y= 12 x2+bx+c交于A，B两点，点A在x轴上，点B的横坐标为4．_刷题宝

题干

如图，在平面直角坐标系内，点O为坐标原点，直线y=

1

2

x+1与抛物线y=

1

2

x²+bx+c交于A，B两点，点A在x轴上，点B的横坐标为4．

上一题下一题 0.0难度选择题更新时间:2018-03-21 10:21:56

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