已知y=x-a-1分之a-x的图像的对称中心是(3,-1)已知,y = (a-x)/(x-a-1) = [-(x-a-1)-1]/(x-a-1) = -1-1/(x-a-1) ,可得:y+1 = -1/(x-a-1) ,则有:该函数图像的对称中心是 (a+1,-1) ,依题意可得:a+1 = 3 ,解得:a = 2 .为什
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![已知y=x-a-1分之a-x的图像的对称中心是(3,-1)已知,y = (a-x)/(x-a-1) = [-(x-a-1)-1]/(x-a-1) = -1-1/(x-a-1) ,可得:y+1 = -1/(x-a-1) ,则有:该函数图像的对称中心是 (a+1,-1) ,依题意可得:a+1 = 3 ,解得:a = 2 .为什](/uploads/image/z/12892419-27-9.jpg?t=%E5%B7%B2%E7%9F%A5y%3Dx-a-1%E5%88%86%E4%B9%8Ba-x%E7%9A%84%E5%9B%BE%E5%83%8F%E7%9A%84%E5%AF%B9%E7%A7%B0%E4%B8%AD%E5%BF%83%E6%98%AF%283%2C-1%29%E5%B7%B2%E7%9F%A5%2Cy+%3D+%28a-x%29%2F%28x-a-1%29+%3D+%5B-%28x-a-1%29-1%5D%2F%28x-a-1%29+%3D+-1-1%2F%28x-a-1%29+%2C%E5%8F%AF%E5%BE%97%EF%BC%9Ay%2B1+%3D+-1%2F%28x-a-1%29+%2C%E5%88%99%E6%9C%89%EF%BC%9A%E8%AF%A5%E5%87%BD%E6%95%B0%E5%9B%BE%E5%83%8F%E7%9A%84%E5%AF%B9%E7%A7%B0%E4%B8%AD%E5%BF%83%E6%98%AF+%28a%2B1%2C-1%29+%2C%E4%BE%9D%E9%A2%98%E6%84%8F%E5%8F%AF%E5%BE%97%EF%BC%9Aa%2B1+%3D+3+%2C%E8%A7%A3%E5%BE%97%EF%BC%9Aa+%3D+2+.%E4%B8%BA%E4%BB%80)
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