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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1/(0.5a-0.1))+(1/(0.5*0.5-0.02)+(1/(0.5*0.5-0.06)) ) ≤(0.5a/((0.5a-0.1)*0.1)) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 / ( 0.5 * a - 0.1 ) ) + ( 1 / ( 0.5 * 0.5 - 0.02 ) + ( 1 / ( 0.5 * 0.5 - 0.06 ) ) ) ≤ ( 0.5 * a / ( ( 0.5 * a - 0.1 ) * 0.1 ) )         (1)
        From the definition field of divisor
         0.5 * x - 0.1 ≠ 0        (2 )
        From the definition field of divisor
         ( 0.5 * x - 0.1 ) * 0.1 ≠ 0        (3 )

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    From inequality(1)：
         a ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
         a < 1/5 或  a ＞ 1/5
    From inequality(3)：
         a < 1/5 或  a ＞ 1/5

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    From inequalities (1) and (2)
         a < 1/5 或  a ＞ 1/5    (4)
    From inequalities (3) and (4)
         a < 1/5 或  a ＞ 1/5    (5)

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    The final solution set is :
         a < 1/5 或  a ＞ 1/5

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