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

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

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    From inequality(1)：
         x ≤ 0 或  0 ≤ x ≤ 0 或  x ≥ 0
    From inequality(2)：
         x ≤ 1 或  1 ≤ x ≤ 1 或  x ≥ 1
    From inequality(3)：
         x ＞ 0

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    From inequalities (1) and (2)
         x ≤ 0 或  0 ≤ x ≤ 0 或  0 ≤ x ≤ 1 或  1 ≤ x ≤ 1 或  x ≥ 1    (4)
    From inequalities (3) and (4)
         0 < x ≤ 0 或  0 ≤ x ≤ 0 或  0 ≤ x ≤ 1 或  1 ≤ x ≤ 1 或  x ≥ 1    (5)

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    The final solution set is :
         0 < x ≤ 0 或  0 ≤ x ≤ 0 或  0 ≤ x ≤ 1 或  1 ≤ x ≤ 1 或  x ≥ 1

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