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

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

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    From inequality(1)：
         y < 0

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    The final solution set is :
         y < 0

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