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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 27×a∧6－81×a∧5＋135×a∧4－9×a∧3＋63×a∧2－9×a－1 ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        27 × a ^ 6 - 81 × a ^ 5 + 135 × a ^ 4 - 9 × a ^ 3 + 63 × a ^ 2 - 9 × a - 1 ≥0         (1)

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    From inequality(1)：
         a ≤ -0.072987 或  a ≥ 0.208199

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    The final solution set is :
         a ≤ -0.072987 或  a ≥ 0.208199

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