椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+2k²),在此基础上,怎么求 Y1+Y2,Y1×Y2?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 04:32:39
![椭圆x²/8+y²/4=1与直线y=k(x-1)交于A,B,k为斜率,联立可解得X1+X2=4k²/(1+2k²),X1×X2=(2k²-8)/(1+2k²),在此基础上,怎么求 Y1+Y2,Y1×Y2?](/uploads/image/z/9343444-4-4.jpg?t=%E6%A4%AD%E5%9C%86x%26%23178%3B%2F8%2By%26%23178%3B%2F4%3D1%E4%B8%8E%E7%9B%B4%E7%BA%BFy%3Dk%28x-1%29%E4%BA%A4%E4%BA%8EA%2CB%2Ck%E4%B8%BA%E6%96%9C%E7%8E%87%2C%E8%81%94%E7%AB%8B%E5%8F%AF%E8%A7%A3%E5%BE%97X1%2BX2%EF%BC%9D4k%26%23178%3B%2F%281%2B2k%26%23178%3B%29%2CX1%C3%97X2%EF%BC%9D%282k%26%23178%3B-8%29%2F%281%2B2k%26%23178%3B%29%2C%E5%9C%A8%E6%AD%A4%E5%9F%BA%E7%A1%80%E4%B8%8A%2C%E6%80%8E%E4%B9%88%E6%B1%82+Y1%2BY2%2CY1%C3%97Y2%3F)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 04:32:39