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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -8000+（12000/（1+r）） >300+(600/(1+r)) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -8000 + ( 12000 / ( 1 + r ) ) >300 + ( 600 / ( 1 + r ) )         (1)
        From the definition field of divisor
         1 + x ≠ 0        (2 )
        From the definition field of divisor
         1 + x ≠ 0        (3 )

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    From inequality(1)：
         -1 < r < 0.373494
    From inequality(2)：
         r < -1 或  r ＞ -1
    From inequality(3)：
         r < -1 或  r ＞ -1

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    From inequalities (1) and (2)
         -1 < r < 0.373494     (4)
    From inequalities (3) and (4)
         -1 < r < 0.373494     (5)

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    The final solution set is :
         -1 < r < 0.373494

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