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

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

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

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    From inequalities (1) and (2)
         2 < x < 4     (4)
    From inequalities (3) and (4)
         2 < x < 4     (5)

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    The final solution set is :
         2 < x < 4

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