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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -18*x*x+72*x-54 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -18 * x * x + 72 * x - 54 <0         (1)

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    From inequality(1)：
         x < 1 或  x ＞ 3

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    The final solution set is :
         x < 1 或  x ＞ 3

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