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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 4k(1-k^2) >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        4 * k * ( 1 - k ^ 2 ) >0         (1)

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    From inequality(1)：
         k < -1 或  0 < k < 1

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    The final solution set is :
         k < -1 或  0 < k < 1

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