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

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

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

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

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    The final solution set is :
         x < -1 或  1 < x ≤ 3

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