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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -66.616×n×n+1.038×n×n×n+1620.2814+71.284×n ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -66.616 × n × n + 1.038 × n × n × n + 1620.2814 + 71.284 × n ≥0         (1)

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    From inequality(1)：
         -4.29929 ≤ n ≤ 5.792106 或  n ≥ 62.684448

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    The final solution set is :
         -4.29929 ≤ n ≤ 5.792106 或  n ≥ 62.684448

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