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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1 ≤409.6*（2000/（2000+x））*((x-110)/(110+2000)) ≤3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1 ≤409.6 * ( 2000 / ( 2000 + x ) ) * ( ( x - 110 ) / ( 110 + 2000 ) )         (1)
        409.6 * ( 2000 / ( 2000 + x ) ) * ( ( x - 110 ) / ( 110 + 2000 ) ) ≤3         (2)
        From the definition field of divisor
         2000 + x ≠ 0        (3 )

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    From inequality(1)：
        The solution set is empty, that is, within the range of real numbers, the inequality will never be established!
    From inequality(2)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(3)：
         x < -2000 或  x ＞ -2000

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    The final solution set is :
        The solution set is empty,that is, the inequality will never be estatlished within the real number range.

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