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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -66.61684×n×n+0.9714×n×n×n+628.01808-157.55×n ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -66.61684 × n × n + 0.9714 × n × n × n + 628.01808 - 157.55 × n ≥0         (1)

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    From inequality(1)：
         -4.292542 ≤ n ≤ 2.129042 或  n ≥ 70.741676

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    The final solution set is :
         -4.292542 ≤ n ≤ 2.129042 或  n ≥ 70.741676

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