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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （3x2+2x+1）/（x2+x+2） ≤1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 3 * x * 2 + 2 * x + 1 ) / ( x * 2 + x + 2 ) ≤1         (1)
        From the definition field of divisor
         x * 2 + x + 2 ≠ 0        (2 )

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    From inequality(1)：
         -0.666667 ≤ x ≤ 1/5
    From inequality(2)：
         x < -2/3 或  x ＞ -2/3

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    From inequalities (1) and (2)
         -2/3 < x ≤ 1/5     (3)

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    The final solution set is :
         -2/3 < x ≤ 1/5

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