高一数学的一道关于对数函数的题已知p=(log2x-1)·(logab)^2-6log2x·logab+log2x+1(其中a为正常数),当x在区间[1,2]内任意取值时,p的值恒为正,求b的取值范围.
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![高一数学的一道关于对数函数的题已知p=(log2x-1)·(logab)^2-6log2x·logab+log2x+1(其中a为正常数),当x在区间[1,2]内任意取值时,p的值恒为正,求b的取值范围.](/uploads/image/z/2483966-38-6.jpg?t=%E9%AB%98%E4%B8%80%E6%95%B0%E5%AD%A6%E7%9A%84%E4%B8%80%E9%81%93%E5%85%B3%E4%BA%8E%E5%AF%B9%E6%95%B0%E5%87%BD%E6%95%B0%E7%9A%84%E9%A2%98%E5%B7%B2%E7%9F%A5p%3D%28log2x-1%29%C2%B7%28logab%29%5E2-6log2x%C2%B7logab%2Blog2x%2B1%EF%BC%88%E5%85%B6%E4%B8%ADa%E4%B8%BA%E6%AD%A3%E5%B8%B8%E6%95%B0%EF%BC%89%2C%E5%BD%93x%E5%9C%A8%E5%8C%BA%E9%97%B4%5B1%2C2%5D%E5%86%85%E4%BB%BB%E6%84%8F%E5%8F%96%E5%80%BC%E6%97%B6%2Cp%E7%9A%84%E5%80%BC%E6%81%92%E4%B8%BA%E6%AD%A3%2C%E6%B1%82b%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.)
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