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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （X十1）X ≤4046 ≤（X十2）（X十1） .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
         ( X + 1 ) * X ≤4046         (1)
        4046 ≤ ( X + 2 ) * ( X + 1 )         (2)

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    From inequality(1)：
         -64.110141 ≤ X ≤ 63.110141
    From inequality(2)：
         X ≤ -65.110141 或  X ≥ 62.110141

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    From inequalities (1) and (2)
         62.110141 ≤ X ≤ 63.110141    (3)

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    The final solution set is :
         62.110141 ≤ X ≤ 63.110141

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