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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -42.6678×n×n+1.128×n×n×n-293.12732-1507.022×n ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -42.6678 × n × n + 1.128 × n × n × n - 293.12732 - 1507.022 × n ≥0         (1)

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    From inequality(1)：
         -22.098623 ≤ n ≤ -0.195596 或  n ≥ 60.120284

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    The final solution set is :
         -22.098623 ≤ n ≤ -0.195596 或  n ≥ 60.120284

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