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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -6000+1800*((1+i)^7-1)/i*(1+i)^7 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -6000 + 1800 * ( ( 1 + i ) ^ 7 - 1 ) / i * ( 1 + i ) ^ 7 >0         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

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    From inequality(1)：
         i ＞ -0.072559
    From inequality(2)：
         i < 0 或  i ＞ 0

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    From inequalities (1) and (2)
         -0.072559 < i < 0 或  i ＞ 0    (3)

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    The final solution set is :
         -0.072559 < i < 0 或  i ＞ 0

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