已知方程x +(a-2)x+a-1=0的两根x 、x ,则点P(x ,x )在圆x +y =4上,则实数a=_____.已知方程x +(a-2)x+a-1=0的两根x 1、x 则点P(x1 ,x2 )在圆x^2 +y^2 =4上,则实数a=_____。
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![已知方程x +(a-2)x+a-1=0的两根x 、x ,则点P(x ,x )在圆x +y =4上,则实数a=_____.已知方程x +(a-2)x+a-1=0的两根x 1、x 则点P(x1 ,x2 )在圆x^2 +y^2 =4上,则实数a=_____。](/uploads/image/z/5247632-56-2.jpg?t=%E5%B7%B2%E7%9F%A5%E6%96%B9%E7%A8%8Bx+%2B%28a-2%29x%2Ba-1%3D0%E7%9A%84%E4%B8%A4%E6%A0%B9x+%E3%80%81x+%2C%E5%88%99%E7%82%B9P%28x+%2Cx+%29%E5%9C%A8%E5%9C%86x+%2By+%3D4%E4%B8%8A%2C%E5%88%99%E5%AE%9E%E6%95%B0a%EF%BC%9D_____.%E5%B7%B2%E7%9F%A5%E6%96%B9%E7%A8%8Bx+%2B%28a-2%29x%2Ba-1%3D0%E7%9A%84%E4%B8%A4%E6%A0%B9x+1%E3%80%81x+%E5%88%99%E7%82%B9P%28x1+%2Cx2+%29%E5%9C%A8%E5%9C%86x%5E2+%2By%5E2+%3D4%E4%B8%8A%EF%BC%8C%E5%88%99%E5%AE%9E%E6%95%B0a%EF%BC%9D_____%E3%80%82)
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