椭圆弦长计算公式椭圆或抛物线 如图O是坐标原点,P(0,130)椭圆或抛物线顶点,一条平行X轴的直线交于椭圆或抛物线于A,B两点,交Y轴于T(0,129)点.坐标是A(X1,Y1),B(X2,Y2).已知X轴两点与抛物线
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![椭圆弦长计算公式椭圆或抛物线 如图O是坐标原点,P(0,130)椭圆或抛物线顶点,一条平行X轴的直线交于椭圆或抛物线于A,B两点,交Y轴于T(0,129)点.坐标是A(X1,Y1),B(X2,Y2).已知X轴两点与抛物线](/uploads/image/z/2592928-64-8.jpg?t=%E6%A4%AD%E5%9C%86%E5%BC%A6%E9%95%BF%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F%E6%A4%AD%E5%9C%86%E6%88%96%E6%8A%9B%E7%89%A9%E7%BA%BF+%E5%A6%82%E5%9B%BEO%E6%98%AF%E5%9D%90%E6%A0%87%E5%8E%9F%E7%82%B9%2CP%EF%BC%880%2C130%EF%BC%89%E6%A4%AD%E5%9C%86%E6%88%96%E6%8A%9B%E7%89%A9%E7%BA%BF%E9%A1%B6%E7%82%B9%2C%E4%B8%80%E6%9D%A1%E5%B9%B3%E8%A1%8CX%E8%BD%B4%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BA%A4%E4%BA%8E%E6%A4%AD%E5%9C%86%E6%88%96%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E4%BA%A4Y%E8%BD%B4%E4%BA%8ET%EF%BC%880%2C129%EF%BC%89%E7%82%B9.%E5%9D%90%E6%A0%87%E6%98%AFA%EF%BC%88X1%2CY1%29%2CB%28X2%2CY2%29.%E5%B7%B2%E7%9F%A5X%E8%BD%B4%E4%B8%A4%E7%82%B9%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BF)
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