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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x^2(7−6x) ≤1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x ^ 2 * ( 7 - 6 * x ) ≤1         (1)

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    From inequality(1)：
         -1/3 ≤ x ≤ 1/2 或  x ≥ 1

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    The final solution set is :
         -1/3 ≤ x ≤ 1/2 或  x ≥ 1

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