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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 20-10k-k^2 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        20 - 10 * k - k ^ 2 >0         (1)

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    From inequality(1)：
         -11.708204 < k < 1.708204

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    The final solution set is :
         -11.708204 < k < 1.708204

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