当Y=f(x)在[a,b}上递增时,Ymax=___,Ymin=___,当f(x)在{a,b}上递减时,Ymax=___,Ymin=___.已知函数f(x)=4X^2-mX+1,在(-∞,-2]上递减,在〔-2,+∞)上递增,则f(x)在〔1,2〕上的值域是___.当Y=f(x)在[a,b]上递增时,Y
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![当Y=f(x)在[a,b}上递增时,Ymax=___,Ymin=___,当f(x)在{a,b}上递减时,Ymax=___,Ymin=___.已知函数f(x)=4X^2-mX+1,在(-∞,-2]上递减,在〔-2,+∞)上递增,则f(x)在〔1,2〕上的值域是___.当Y=f(x)在[a,b]上递增时,Y](/uploads/image/z/14289354-18-4.jpg?t=%E5%BD%93Y%3Df%28x%29%E5%9C%A8%5Ba%2Cb%7D%E4%B8%8A%E9%80%92%E5%A2%9E%E6%97%B6%2CYmax%3D___%2CYmin%3D___%2C%E5%BD%93f%28x%29%E5%9C%A8%7Ba%2Cb%7D%E4%B8%8A%E9%80%92%E5%87%8F%E6%97%B6%2CYmax%3D___%2CYmin%3D___.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D4X%5E2-mX%2B1%2C%E5%9C%A8%28-%E2%88%9E%2C-2%5D%E4%B8%8A%E9%80%92%E5%87%8F%2C%E5%9C%A8%E3%80%94%EF%BC%8D2%2C%EF%BC%8B%E2%88%9E%EF%BC%89%E4%B8%8A%E9%80%92%E5%A2%9E%2C%E5%88%99f%28x%29%E5%9C%A8%E3%80%941%2C2%E3%80%95%E4%B8%8A%E7%9A%84%E5%80%BC%E5%9F%9F%E6%98%AF%EF%BC%BF%EF%BC%BF%EF%BC%BF%EF%BC%8E%E5%BD%93Y%3Df%28x%29%E5%9C%A8%5Ba%2Cb%5D%E4%B8%8A%E9%80%92%E5%A2%9E%E6%97%B6%2CY)
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