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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x^2+x     Question type: Inequality
    Solution:
    The inequality can be reduced to 3 inequalities：
         x ^ 2 + x < ln x         (1)
         ln x < x ^ 2 + 1         (2)
        From the definition field of ln
        x > 0        (3 )
         x ^ 2 + 1 <1         (4)

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    From inequality(1)：
        The solution set is empty, that is, within the range of real numbers, the inequality will never be established!
    From inequality(2)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(3)：
         x ＞ 0
    From inequality(4)：
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!

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    The final solution set is :
        The solution set is empty,that is, the inequality will never be estatlished within the real number range.

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