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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 25x >3000+20x—0.1x×x .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        25 * x >3000 + 20 * x - 0.1 * x × x         (1)

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    From inequality(1)：
         x < -200 或  x ＞ 150

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    The final solution set is :
         x < -200 或  x ＞ 150

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