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

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

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    From inequality(1)：
         n < -2 或  n ＞ -1
    From inequality(2)：
         n < -1 或  n ＞ -1

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    From inequalities (1) and (2)
         n < -2 或  n ＞ -1    (3)

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    The final solution set is :
         n < -2 或  n ＞ -1

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