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

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

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    From inequality(1)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
         x ＞ 1
    From inequality(3)：
         x ＞ 0

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    From inequalities (1) and (2)
         x ＞ 1    (4)
    From inequalities (3) and (4)
         x ＞ 1    (5)

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    The final solution set is :
         x ＞ 1

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