Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

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

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    From inequality(1)：
        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.

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

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    From inequality(1)：
         k < -0.302776 或  k ＞ 3.302776

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    The final solution set is :
         k < -0.302776 或  k ＞ 3.302776

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