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

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

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    From inequality(1)：
         k ≤ 1 或  1 ≤ k ≤ 1 或  k ≥ 1
    From inequality(2)：
         k < 0 或  k ＞ 0
    From inequality(3)：
         k < 0 或  k ＞ 0

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    From inequalities (1) and (2)
         k < 0 或  0 < k ≤ 1 或  1 ≤ k ≤ 1 或  k ≥ 1    (4)
    From inequalities (3) and (4)
         k < 0 或  0 < k ≤ 1 或  1 ≤ k ≤ 1 或  k ≥ 1    (5)

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    The final solution set is :
         k < 0 或  0 < k ≤ 1 或  1 ≤ k ≤ 1 或  k ≥ 1

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