Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality a >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         a >0         (1)

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    From inequality(1)：
         a ＞ 0

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    The final solution set is :
         a ＞ 0
[ 2/2Inequality]
    Assignment:Find the solution set of inequality (a-1)^2-4a ≤0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( a - 1 ) ^ 2 - 4 * a ≤0         (1)

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    From inequality(1)：
         0.171573 ≤ a ≤ 5.828427

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    The final solution set is :
         0.171573 ≤ a ≤ 5.828427

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