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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality X^3-19.21X-39.76 >= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         X ^ 3 - 19.21 * X - 39.76 >= 0         (1)

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    From inequality(1)：
         X ≥ 5.184498

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    The final solution set is :
         X ≥ 5.184498

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