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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality sqrt（4x-x^2）     Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sqrt ( 4 * x - x ^ 2 ) < x         (1)
        From the definition field of √
         4 * x - x ^ 2 ≥ 0        (2 )

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    From inequality(1)：
         x < 0 或  x ＞ 2
    From inequality(2)：
         0 ≤ x ≤ 4

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    From inequalities (1) and (2)
         2 < x ≤ 4     (3)

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    The final solution set is :
         2 < x ≤ 4

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