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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -ln（-a）-a²+1 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -ln ( -a ) - a ^ 2 + 1 <0         (1)
        From the definition field of ln
         -x > 0        (2 )

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    From inequality(1)：
         a < -1
    From inequality(2)：
         a < 0

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

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    The final solution set is :
         a < -1

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