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

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

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    From inequality(1)：
        The solution set is empty, that is, within the range of real numbers, the inequality will never be established!
    From inequality(2)：
         x ＞ -1
    From inequality(3)：
         x < 0 或  x ＞ 0

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    The final solution set is :
        The solution set is empty,that is, the inequality will never be estatlished within the real number range.

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