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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1-20x+400/3*x^2-1000*x^3+20000/3*x^4)^2 <1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 - 20 * x + 400 / 3 * x ^ 2 - 1000 * x ^ 3 + 20000 / 3 * x ^ 4 ) ^ 2 <1         (1)

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    From inequality(1)：
         0 < x < 3/20

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    The final solution set is :
         0 < x < 3/20

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