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

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

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    From inequality(1)：
         x ≤ 0 或  x ≥ 3/2
    From inequality(2)：
         x ＞ 0
    From inequality(3)：
         x < 0 或  x ＞ 0

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    From inequalities (1) and (2)
         x ≥ 3/2    (4)
    From inequalities (3) and (4)
         x ≥ 3/2    (5)

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    The final solution set is :
         x ≥ 3/2

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