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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1 ≤sqrt5a^2+9-12a .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1 ≤ sqrt 5 * a ^ 2 + 9 - 12 * a         (1)

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    From inequality(1)：
         a ≤ 0.78005 或  a ≥ 4.586513

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    The final solution set is :
         a ≤ 0.78005 或  a ≥ 4.586513

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