作业帮圆锥曲线弦长公式d = √(1+k²)|x1-x2| = √(1+k²)[(x1+x2)² - 4x1x2]中k应该带什么?
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 07:17:16
![圆锥曲线弦长公式d = √(1+k²)|x1-x2| = √(1+k²)[(x1+x2)² - 4x1x2]中k应该带什么?](/uploads/image/z/5231914-34-4.jpg?t=%E5%9C%86%E9%94%A5%E6%9B%B2%E7%BA%BF%E5%BC%A6%E9%95%BF%E5%85%AC%E5%BC%8Fd+%3D+%E2%88%9A%281%2Bk%26%23178%3B%29%7Cx1-x2%7C+%3D+%E2%88%9A%281%2Bk%26%23178%3B%29%5B%28x1%2Bx2%29%26%23178%3B+-+4x1x2%5D%E4%B8%ADk%E5%BA%94%E8%AF%A5%E5%B8%A6%E4%BB%80%E4%B9%88%3F)
圆锥曲线弦长公式d = √(1+k²)|x1-x2| = √(1+k²)[(x1+x2)² - 4x1x2]中k应该带什么?
圆锥曲线弦长公式d = √(1+k²)|x1-x2| = √(1+k²)[(x1+x2)² - 4x1x2]中k应该带什么?
圆锥曲线弦长公式d = √(1+k²)|x1-x2| = √(1+k²)[(x1+x2)² - 4x1x2]中k应该带什么?
带直线的斜率,即弦的斜率