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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -1/2*x^2+60*x-800 >800 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -1 / 2 * x ^ 2 + 60 * x - 800 >800         (1)

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    From inequality(1)：
         40 < x < 80

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    The final solution set is :
         40 < x < 80

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