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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 100 <100(1+x)0.9 <103 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        100 <100 * ( 1 + x ) * 0.9         (1)
        100 * ( 1 + x ) * 0.9 <103         (2)

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    From inequality(1)：
         x ＞ 1/9
    From inequality(2)：
         x < 13/90

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    From inequalities (1) and (2)
         1/9 < x < 13/90     (3)

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    The final solution set is :
         1/9 < x < 13/90

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