直线y=-1|3x+1分别交x轴、y轴于A、B两点、直线y=-1|3x+1分别交x轴、y轴于A、B两点,△AOB绕点O按逆时针方向旋转90°得到△COD,抛物线y=ax2+bx+c经过A、C、D三点.(1)写出点A、B、C、D的坐标;(2)求
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 19:09:25
![直线y=-1|3x+1分别交x轴、y轴于A、B两点、直线y=-1|3x+1分别交x轴、y轴于A、B两点,△AOB绕点O按逆时针方向旋转90°得到△COD,抛物线y=ax2+bx+c经过A、C、D三点.(1)写出点A、B、C、D的坐标;(2)求](/uploads/image/z/9711073-1-3.jpg?t=%E7%9B%B4%E7%BA%BFy%3D-1%7C3x%2B1%E5%88%86%E5%88%AB%E4%BA%A4x%E8%BD%B4%E3%80%81y%E8%BD%B4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%E3%80%81%E7%9B%B4%E7%BA%BFy%3D-1%7C3x%2B1%E5%88%86%E5%88%AB%E4%BA%A4x%E8%BD%B4%E3%80%81y%E8%BD%B4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%2C%E2%96%B3AOB%E7%BB%95%E7%82%B9O%E6%8C%89%E9%80%86%E6%97%B6%E9%92%88%E6%96%B9%E5%90%91%E6%97%8B%E8%BD%AC90%C2%B0%E5%BE%97%E5%88%B0%E2%96%B3COD%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bbx%2Bc%E7%BB%8F%E8%BF%87A%E3%80%81C%E3%80%81D%E4%B8%89%E7%82%B9%EF%BC%8E%EF%BC%881%EF%BC%89%E5%86%99%E5%87%BA%E7%82%B9A%E3%80%81B%E3%80%81C%E3%80%81D%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82)
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