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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality a²+4/a² ≥4 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         a ^ 2 + 4 / a ^ 2 ≥4         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

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    From inequality(1)：
         a ≤ -7064/4995 或  -7064/4995 ≤ a ≤ -7064/4995 或  -7064/4995 ≤ a ≤ 1414213/1000000 或  1414213/1000000 ≤ a ≤ 1414213/1000000 或  a ≥ 1414213/1000000
    From inequality(2)：
         a < 0 或  a ＞ 0

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    From inequalities (1) and (2)
         a ≤ -7064/4995 或  -7064/4995 ≤ a ≤ -7064/4995 或  -7064/4995 ≤ a < 0 或  0 < a ≤ 1414213/1000000 或  1414213/1000000 ≤ a ≤ 1414213/1000000 或  a ≥ 1414213/1000000    (3)

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    The final solution set is :
         a ≤ -7064/4995 或  -7064/4995 ≤ a ≤ -7064/4995 或  -7064/4995 ≤ a < 0 或  0 < a ≤ 1414213/1000000 或  1414213/1000000 ≤ a ≤ 1414213/1000000 或  a ≥ 1414213/1000000

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