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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x/(1000-x) >0.3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x / ( 1000 - x ) >0.3         (1)
        From the definition field of divisor
         1000 - x ≠ 0        (2 )

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    From inequality(1)：
         x ＞ 230.769231
    From inequality(2)：
         x < 1000 或  x ＞ 1000

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    From inequalities (1) and (2)
         230.769231 < x < 1000 或  x ＞ 1000    (3)

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    The final solution set is :
         230.769231 < x < 1000 或  x ＞ 1000

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