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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 10(1+x)x/2 >= 2000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        10 * ( 1 + x ) * x / 2 >= 2000         (1)

---

    From inequality(1)：
         x ≤ -20.506249 或  x ≥ 19.506249

---

    The final solution set is :
         x ≤ -20.506249 或  x ≥ 19.506249

Your problem has not been solved here? Please take a look at the  hot problems ！