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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x/(x+1)     Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
         x / ( x + 1 ) < ln ( x + 1 )         (1)
        From the definition field of divisor
         x + 1 ≠ 0        (2 )
         ln ( x + 1 ) < x         (3)
        From the definition field of ln
         x + 1 > 0        (4 )

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    From inequality(1)：
         -1 < x < 0 或  x ＞ 0
    From inequality(2)：
         x < -1 或  x ＞ -1
    From inequality(3)：
         x < 0 或  x ＞ 0
    From inequality(4)：
         x ＞ -1

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    From inequalities (1) and (2)
         -1 < x < 0 或  x ＞ 0    (5)
    From inequalities (3) and (5)
         -1 < x < 0 或  x ＞ 0 或  x ＞ 0    (6)
    From inequalities (4) and (6)
         -1 < x < 0 或  x ＞ 0    (7)

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    The final solution set is :
         -1 < x < 0 或  x ＞ 0

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