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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -2000+500÷（1+X）+700÷（1+X）^2＋2000÷（1+X）^3 >-10000+8000÷（1+X）+2500÷（1+X）^2+2000÷（1+X）^3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -2000 + 500 ÷ ( 1 + X ) + 700 ÷ ( 1 + X ) ^ 2 + 2000 ÷ ( 1 + X ) ^ 3 > -10000 + 8000 ÷ ( 1 + X ) + 2500 ÷ ( 1 + X ) ^ 2 + 2000 ÷ ( 1 + X ) ^ 3         (1)

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    From inequality(1)：
         X < -1.198128 或  X ＞ 0.135628

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

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