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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0     Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0 < x ^ 2 - x - 2         (1)
         x ^ 2 - x - 2 ≤0         (2)

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    From inequality(1)：
         x < -1 或  x ＞ 2
    From inequality(2)：
         -1 ≤ x ≤ 2

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    From inequalities (1) and (2)
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!    (3)

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    The final solution set is :
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!

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