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

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

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    From inequality(1)：
         x ≤ -0.754878 或  x ≥ -0.000001
    From inequality(2)：
         x < 0 或  x ＞ 0

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    From inequalities (1) and (2)
         x ≤ -0.754878 或  -0.000001 ≤ x < 0 或  x ＞ 0    (3)

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    The final solution set is :
         x ≤ -0.754878 或  -0.000001 ≤ x < 0 或  x ＞ 0

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