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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （1180+a）（200a－980）∧2/380（800+a）（180+a）1000 <2.706 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1180 + a ) * ( 200 * a - 980 ) ^ 2 / 380 * ( 800 + a ) * ( 180 + a ) * 1000 <2.706         (1)

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    From inequality(1)：
         a < -180

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    The final solution set is :
         a < -180

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