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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -67a^4+2a^6+308a^2 ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -67 * a ^ 4 + 2 * a ^ 6 + 308 * a ^ 2 ≥0         (1)

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    From inequality(1)：
         a ≤ -√28 或  -√11/√2 ≤ a ≤ 0 或  0 ≤ a ≤ 0 或  0 ≤ a ≤ √11/√2 或  a ≥ √28

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    The final solution set is :
         a ≤ -√28 或  -√11/√2 ≤ a ≤ 0 或  0 ≤ a ≤ 0 或  0 ≤ a ≤ √11/√2 或  a ≥ √28

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