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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality log(a,1+a) ≥2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         log( a , 1 + a ) ≥2         (1)
        From the definition field of log
         x > 0        (2 )
         1 + x > 0 also ≠ 1        (3 )

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    From inequality(1)：
         1 ≤ a ≤ 1.618034
    From inequality(2)：
         a ＞ 0
    From inequality(3)：
         -1 < a < 0 或  a ＞ 0

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    From inequalities (1) and (2)
         1 ≤ a ≤ 1.618034    (4)
    From inequalities (3) and (4)
         1 ≤ a ≤ 1.618034    (5)

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    The final solution set is :
         1 ≤ a ≤ 1.618034

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