Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

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

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    From inequality(1)：
         x ≥ 1
    From inequality(2)：
         x ≤ 2

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

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

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    From inequality(1)：
         y ≥ 2
    From inequality(2)：
         y ≤ 3

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    From inequalities (1) and (2)
         2 ≤ y ≤ 3    (3)

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    The final solution set is :
         2 ≤ y ≤ 3

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以下题目输入有误或有空行，请仔细检查，改正后再计算：
1==>错误类型：方程含有多元未知数(2): xy≤ax^2+2y^2
解多元方程，请点击多元方程
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