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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （x-5）(x+1)(x-3) <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( x - 5 ) * ( x + 1 ) * ( x - 3 ) <0         (1)

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    From inequality(1)：
         x < -1 或  3 < x < 5

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    The final solution set is :
         x < -1 或  3 < x < 5

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