Overview: 4 questions will be solved this time.Among them
           ☆4 inequalities

[ 1/4Inequality]
    Assignment:Find the solution set of inequality 1-a >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1 - a >0         (1)

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    From inequality(1)：
         a < 1

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    The final solution set is :
         a < 1
[ 2/4Inequality]
    Assignment:Find the solution set of inequality 2a+4 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * a + 4 >0         (1)

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    From inequality(1)：
         a ＞ -2

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    The final solution set is :
         a ＞ -2
[ 3/4Inequality]
    Assignment:Find the solution set of inequality a-3 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         a - 3 <0         (1)

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    From inequality(1)：
         a < 3

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    The final solution set is :
         a < 3
[ 4/4Inequality]
    Assignment:Find the solution set of inequality -2a >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -2 * a >0         (1)

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    From inequality(1)：
         a < 0

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    The final solution set is :
         a < 0

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