Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.9ln(2*x) ≥ln(x) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.9 * ln ( 2 * x ) ≥ ln ( x )         (1)
        From the definition field of ln
         2 * x > 0        (2 )
        From the definition field of ln
         x > 0        (3 )

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    From inequality(1)：
         x ≤ 512
    From inequality(2)：
         x ＞ 0
    From inequality(3)：
         x ＞ 0

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    From inequalities (1) and (2)
         0 < x ≤ 512     (4)
    From inequalities (3) and (4)
         0 < x ≤ 512     (5)

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    The final solution set is :
         0 < x ≤ 512

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