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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1800/(1+x)^2+7500/(1+x)-8000 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1800 / ( 1 + x ) ^ 2 + 7500 / ( 1 + x ) - 8000 <0         (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)：
         x < -1.198128 或  x ＞ 0.135628
    From inequality(2)：
         x < -1 或  x ＞ -1
    From inequality(3)：
         x < -1 或  x ＞ -1

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    From inequalities (1) and (2)
         x < -1.198128 或  x ＞ 0.135628    (4)
    From inequalities (3) and (4)
         x < -1.198128 或  x ＞ 0.135628    (5)

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    The final solution set is :
         x < -1.198128 或  x ＞ 0.135628

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