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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1/5（x-100+4500/x） <= 9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1 / 5 * ( x - 100 + 4500 / x ) <= 9         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

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    From inequality(1)：
         x ≤ 0 或  45 ≤ x ≤ 100
    From inequality(2)：
         x < 0 或  x ＞ 0

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    From inequalities (1) and (2)
         x < 0 或  45 ≤ x ≤ 100    (3)

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    The final solution set is :
         x < 0 或  45 ≤ x ≤ 100

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