过抛物线x^2=2py(p>0)的焦点作直线交于A(x1,y1),B(x2,y2)求证:向量OA*OB为定值过抛物线x^2=2py(p>0)的焦点作直线交于A(x1,y1),B(x2,y2)求证:向量OA*OB为定值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 00:41:02
![过抛物线x^2=2py(p>0)的焦点作直线交于A(x1,y1),B(x2,y2)求证:向量OA*OB为定值过抛物线x^2=2py(p>0)的焦点作直线交于A(x1,y1),B(x2,y2)求证:向量OA*OB为定值](/uploads/image/z/6956213-5-3.jpg?t=%E8%BF%87%E6%8A%9B%E7%89%A9%E7%BA%BFx%5E2%3D2py%EF%BC%88p%3E0%EF%BC%89%E7%9A%84%E7%84%A6%E7%82%B9%E4%BD%9C%E7%9B%B4%E7%BA%BF%E4%BA%A4%E4%BA%8EA%EF%BC%88x1%2Cy1%EF%BC%89%2CB%EF%BC%88x2%2Cy2%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9A%E5%90%91%E9%87%8FOA%2AOB%E4%B8%BA%E5%AE%9A%E5%80%BC%E8%BF%87%E6%8A%9B%E7%89%A9%E7%BA%BFx%5E2%3D2py%EF%BC%88p%3E0%EF%BC%89%E7%9A%84%E7%84%A6%E7%82%B9%E4%BD%9C%E7%9B%B4%E7%BA%BF%E4%BA%A4%E4%BA%8EA%EF%BC%88x1%2Cy1%EF%BC%89%2CB%EF%BC%88x2%2Cy2%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9A%E5%90%91%E9%87%8FOA%2AOB%E4%B8%BA%E5%AE%9A%E5%80%BC)
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