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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 80r^2-13+8500r >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        80 * r ^ 2 - 13 + 8500 * r >0         (1)

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    From inequality(1)：
         r < -106.251529 或  r ＞ 0.001529

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    The final solution set is :
         r < -106.251529 或  r ＞ 0.001529

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