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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality e^(-x*3.14159/sqrt(1-x^2)) <= 0.16 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         e ^ ( -x * 3.14159 / sqrt ( 1 - x ^ 2 ) ) <= 0.16         (1)
        From the definition field of √
         1 - x ^ 2 ≥ 0        (2 )

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    From inequality(1)：
         x ≤ -1 或  x ≥ 0.503868
    From inequality(2)：
         -1 ≤ x ≤ 1

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    From inequalities (1) and (2)
         -1 ≤ x ≤ -1 或  0.503868 ≤ x ≤ 1    (3)

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    The final solution set is :
         -1 ≤ x ≤ -1 或  0.503868 ≤ x ≤ 1

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