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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 900 <3000*(1-19%)^n .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        900 <3000 * ( 1 - 19 % ) ^ n         (1)

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    From inequality(1)：
         n < 5.713586

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    The final solution set is :
         n < 5.713586

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