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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3a（a－1）（a－2） ≤2a（a＋1）+6a（a－1） .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3 * a * ( a - 1 ) * ( a - 2 ) ≤2 * a * ( a + 1 ) + 6 * a * ( a - 1 )         (1)

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    From inequality(1)：
         a ≤ 0 或  2/3 ≤ a ≤ 5

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    The final solution set is :
         a ≤ 0 或  2/3 ≤ a ≤ 5

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