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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （1+5x）^(-4)-0.1 <1-20x <（1+5x）^(-4)+0.1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
         ( 1 + 5 * x ) ^ ( -4 ) - 0.1 <1 - 20 * x         (1)
        1 - 20 * x < ( 1 + 5 * x ) ^ ( -4 ) + 0.1         (2)

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    From inequality(1)：
         x < -0.320791 或  -0.018144 < x < 0.022156
    From inequality(2)：
         x ＞ 0

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    From inequalities (1) and (2)
         0 < x < 0.022156     (3)

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    The final solution set is :
         0 < x < 0.022156

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