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

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

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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 或  x ＞ -1

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

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

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