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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3600 ≤(-200x+4400)(x-13) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3600 ≤ ( -200 * x + 4400 ) * ( x - 13 )         (1)

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    From inequality(1)：
         16 ≤ x ≤ 19

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    The final solution set is :
         16 ≤ x ≤ 19

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