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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (9-x)^55(10-x)^66(12-x)^77÷(7-x)^30(8-x)^40 = ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 9 - x ) ^ 55 * ( 10 - x ) ^ 66 * ( 12 - x ) ^ 77 ÷ ( 7 - x ) ^ 30 * ( 8 - x ) ^ 40 ≥0         (1)

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    From inequality(1)：
         x ≤ 8 或  8 ≤ x ≤ 8 或  8 ≤ x ≤ 9/1 或  10/1 ≤ x ≤ 10/1 或  x ≥ 12000049/1000000

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    The final solution set is :
         x ≤ 8 或  8 ≤ x ≤ 8 或  8 ≤ x ≤ 9/1 或  10/1 ≤ x ≤ 10/1 或  x ≥ 12000049/1000000

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