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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x^3+5*x^2-x-1 >= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x ^ 3 + 5 * x ^ 2 - x - 1 >= 0         (1)

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    From inequality(1)：
         -5.156325 ≤ x ≤ -0.369102 或  x ≥ 0.525428

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    The final solution set is :
         -5.156325 ≤ x ≤ -0.369102 或  x ≥ 0.525428

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