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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (139.8-1/(4*x))/(150*x-(1/600*x)) <= 0.5 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 139.8 - 1 / ( 4 * x ) ) / ( 150 * x - ( 1 / 600 * x ) ) <= 0.5         (1)
        From the definition field of divisor
         4 * x ≠ 0        (2 )
        From the definition field of divisor
         150 * x - ( 1 / 600 * x ) ≠ 0        (3 )

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    From inequality(1)：
         x ≤ 0.00179 或  x ≥ 1.862231
    From inequality(2)：
         x < 0 或  x ＞ 0
    From inequality(3)：
         x < 0 或  x ＞ 0

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    From inequalities (1) and (2)
         x < 0 或  0 < x ≤ 0.00179 或  x ≥ 1.862231    (4)
    From inequalities (3) and (4)
         x < 0 或  0 < x ≤ 0.00179 或  x ≥ 1.862231    (5)

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    The final solution set is :
         x < 0 或  0 < x ≤ 0.00179 或  x ≥ 1.862231

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