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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (-2000+500/(1+9%)+700/(1+9%)^2+2000/(1+9%)^3) >(-10000+8000/(1+9%)+2500/(1+9%)^2+2000/(1+9%)^3) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( -2000 + 500 / ( 1 + 9 % ) + 700 / ( 1 + 9 % ) ^ 2 + 2000 / ( 1 + 9 % ) ^ 3 ) > ( -10000 + 8000 / ( 1 + 9 % ) + 2500 / ( 1 + 9 % ) ^ 2 + 2000 / ( 1 + 9 % ) ^ 3 )         (1)

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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!

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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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