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

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

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    From inequality(1)：
         a < 0 或  a ＞ 1

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

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    From inequality(1)：
         a ＞ -2
    From inequality(2)：
         a < 1

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

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    The final solution set is :
         -2 < a < 1

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