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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality n^2+n <2000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         n ^ 2 + n <2000         (1)

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    From inequality(1)：
         -45.224155 < n < 44.224155

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    The final solution set is :
         -45.224155 < n < 44.224155

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