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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 60n-12000 <= 80*sqrt(n) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        60 * n - 12000 <= 80 * sqrt ( n )         (1)
        From the definition field of √
         x ≥ 0        (2 )

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    From inequality(1)：
         n ≤ 219.766009
    From inequality(2)：
         n ≥ 0

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    From inequalities (1) and (2)
         0 ≤ n ≤ 219.766009    (3)

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    The final solution set is :
         0 ≤ n ≤ 219.766009

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