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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 30.2375*x+13*x*(x+1)/2 >500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        30.2375 * x + 13 * x * ( x + 1 ) / 2 >500         (1)

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    From inequality(1)：
         x < -12.040577 或  x ＞ 6.388654

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    The final solution set is :
         x < -12.040577 或  x ＞ 6.388654

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