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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1/i-1/i(1+i)^7 <4.167 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1 / i - 1 / i * ( 1 + i ) ^ 7 <4.167         (1)
        From the definition field of divisor
        x ≠ 0        (2 )
        From the definition field of divisor
        x ≠ 0        (3 )

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    From inequality(1)：
         i ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
         i < 0 或  i ＞ 0
    From inequality(3)：
         i < 0 或  i ＞ 0

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    From inequalities (1) and (2)
         i < 0 或  i ＞ 0    (4)
    From inequalities (3) and (4)
         i < 0 或  i ＞ 0    (5)

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

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