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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality e^x-1-2*(x+0.5*x^2) ≤0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         e ^ x - 1 - 2 * ( x + 0.5 * x ^ 2 ) ≤0         (1)

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    From inequality(1)：
         x ≤ -1.47767 或  0 ≤ x ≤ 2.512862

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    The final solution set is :
         x ≤ -1.47767 或  0 ≤ x ≤ 2.512862

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