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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1 ≤3-a ≤5 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1 ≤3 - a         (1)
        3 - a ≤5         (2)

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    From inequality(1)：
         a ≤ 2
    From inequality(2)：
         a ≥ -2

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    From inequalities (1) and (2)
         -2 ≤ a ≤ 2    (3)

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    The final solution set is :
         -2 ≤ a ≤ 2

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