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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -20.945×n×n+1.59×n×n×n+1664.5179-1151.86×n ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -20.945 × n × n + 1.59 × n × n × n + 1664.5179 - 1151.86 × n ≥0         (1)

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    From inequality(1)：
         -21.969989 ≤ n ≤ 1.412673 或  n ≥ 33.730272

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    The final solution set is :
         -21.969989 ≤ n ≤ 1.412673 或  n ≥ 33.730272

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