直线y=ax(a>0)与双曲线y=2/x交于A(x1,y1),B(x2,y2)两点,则3x1y2-2x2y1等于多少?
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![直线y=ax(a>0)与双曲线y=2/x交于A(x1,y1),B(x2,y2)两点,则3x1y2-2x2y1等于多少?](/uploads/image/z/14283357-69-7.jpg?t=%E7%9B%B4%E7%BA%BFy%3Dax%28a%3E0%29%E4%B8%8E%E5%8F%8C%E6%9B%B2%E7%BA%BFy%3D2%2Fx%E4%BA%A4%E4%BA%8EA%28x1%2Cy1%29%2CB%28x2%2Cy2%29%E4%B8%A4%E7%82%B9%2C%E5%88%993x1y2-2x2y1%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%3F)
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直线y=ax(a>0)与双曲线y=2/x交于A(x1,y1),B(x2,y2)两点,则3x1y2-2x2y1等于多少?
直线y=ax(a>0)与双曲线y=2/x交于A(x1,y1),B(x2,y2)两点,则3x1y2-2x2y1等于多少?
直线y=ax(a>0)与双曲线y=2/x交于A(x1,y1),B(x2,y2)两点,则3x1y2-2x2y1等于多少?
X1=√(2/a) y1=√(2a)
X2=-√(2/a) y2=-√(2a)
代入原式得 -2