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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3b^3+13b^2+11b-9 <0 > 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        3 * b ^ 3 + 13 * b ^ 2 + 11 * b - 9 <0         (1)
        0 > 0         (2)

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    From inequality(1)：
         b < 0.495223
    From inequality(2)：
        The solution set is empty, that is, within the range of real numbers, the inequality will never be established!

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    The final solution set is :
        The solution set is empty,that is, the inequality will never be estatlished within the real number range.

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