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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3 ≤x^2-2x+4 <4 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        3 ≤ x ^ 2 - 2 * x + 4         (1)
         x ^ 2 - 2 * x + 4 <4         (2)

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

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

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    The final solution set is :
         0 < x ≤ 1 或  1 ≤ x ≤ 1 或  1 ≤ x < 2

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