已知抛物线y=ax2−2x+1(a≠0)的顶点为P,有下列结论:
①当a<0时,抛物线与直线y=2x+2没有交点;
②若抛物线与x轴有两个交点,则其中一定有一个交点在点(0,0)与(1,0)之间;
③若点P在点(0,0),(2,0),(0,2)所围成的三角形区域内(包括边界),则a≥1.
其中,正确结论的个数是( ).
①当a<0时,抛物线与直线y=2x+2没有交点;
②若抛物线与x轴有两个交点,则其中一定有一个交点在点(0,0)与(1,0)之间;
③若点P在点(0,0),(2,0),(0,2)所围成的三角形区域内(包括边界),则a≥1.
其中,正确结论的个数是( ).
A.0 | B.1 | C.2 | D.3 |
2022·天津红桥·三模 查看更多[2]
更新时间:2022-06-14 08:33:13
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