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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x(50-2x)(30-2x) >4000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * ( 50 - 2 * x ) * ( 30 - 2 * x ) >4000         (1)

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    From inequality(1)：
         5 < x < 7.192236 或  x ＞ 27.807764

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    The final solution set is :
         5 < x < 7.192236 或  x ＞ 27.807764

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