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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality k*k-72k+900 ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         k * k - 72 * k + 900 ≥0         (1)

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    From inequality(1)：
         k ≤ 16.100251 或  k ≥ 55.899749

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    The final solution set is :
         k ≤ 16.100251 或  k ≥ 55.899749

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