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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1 ≤2X-1 <9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1 ≤2 * x - 1         (1)
        2 * x - 1 <9         (2)

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    From inequality(1)：
         x ≥ 1
    From inequality(2)：
         x < 5

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    From inequalities (1) and (2)
         1 ≤ x < 5    (3)

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    The final solution set is :
         1 ≤ x < 5

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