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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0 >0.15*(n-1)-5sqrt(0.03*(n-1)) >-20 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0 >0.15 * ( n - 1 ) - 5 * sqrt ( 0.03 * ( n - 1 ) )         (1)
        0.15 * ( n - 1 ) - 5 * sqrt ( 0.03 * ( n - 1 ) ) > -20         (2)
        From the definition field of √
         0.03 * ( x - 1 ) ≥ 0        (3 )

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    From inequality(1)：
         n < 103/3
    From inequality(2)：
         n ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(3)：
         n ≥ 1

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    From inequalities (1) and (2)
         n < 103/3    (4)
    From inequalities (3) and (4)
         1 ≤ n < 103/3    (5)

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    The final solution set is :
         1 ≤ n < 103/3

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