若lga和lgb是方程2x^-4x+1=0的两个实根,求【lg(ab)乘(lga/b)^】的值 (x^是X的平方的意思)若lga和lgb是方程2x^-4x+1=0的两个实根,求【lg(ab)乘(lga/b)^】的值 (x^是X的平方的意思) 谢咯
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![若lga和lgb是方程2x^-4x+1=0的两个实根,求【lg(ab)乘(lga/b)^】的值 (x^是X的平方的意思)若lga和lgb是方程2x^-4x+1=0的两个实根,求【lg(ab)乘(lga/b)^】的值 (x^是X的平方的意思) 谢咯](/uploads/image/z/1123678-46-8.jpg?t=%E8%8B%A5lga%E5%92%8Clgb%E6%98%AF%E6%96%B9%E7%A8%8B2x%5E-4x%2B1%3D0%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%AE%9E%E6%A0%B9%2C%E6%B1%82%E3%80%90lg%28ab%29%E4%B9%98%28lga%2Fb%29%5E%E3%80%91%E7%9A%84%E5%80%BC+%28x%5E%E6%98%AFX%E7%9A%84%E5%B9%B3%E6%96%B9%E7%9A%84%E6%84%8F%E6%80%9D%EF%BC%89%E8%8B%A5lga%E5%92%8Clgb%E6%98%AF%E6%96%B9%E7%A8%8B2x%5E-4x%2B1%3D0%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%AE%9E%E6%A0%B9%2C%E6%B1%82%E3%80%90lg%28ab%29%E4%B9%98%28lga%2Fb%29%5E%E3%80%91%E7%9A%84%E5%80%BC+%28x%5E%E6%98%AFX%E7%9A%84%E5%B9%B3%E6%96%B9%E7%9A%84%E6%84%8F%E6%80%9D%EF%BC%89+%E8%B0%A2%E5%92%AF)
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