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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 2.5n(1+5%)^n-4(1+5%)^n ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2.5 * n * ( 1 + 5 % ) ^ n - 4 * ( 1 + 5 % ) ^ n ≥0         (1)

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    From inequality(1)：
         n ≥ 8/5

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    The final solution set is :
         n ≥ 8/5

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