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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality e^(-aπ/(1-a^2)^(1/2)) <0.2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         e ^ ( -a * π / ( 1 - a ^ 2 ) ^ ( 1 / 2 ) ) <0.2         (1)
        From the definition field of divisor
         1 - x ^ 2 ≠ 0        (2 )

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    From inequality(1)：
         a < 0.173051
    From inequality(2)：
         a < -1 或  -1 < a < 1 或  a ＞ 1

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    From inequalities (1) and (2)
         a < -1 或  -1 < a < 0.173051     (3)

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    The final solution set is :
         a < -1 或  -1 < a < 0.173051

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