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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0 <(1-l/-1.25)*(1-l/1.6) <1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0 < ( 1 - l / -1.25 ) * ( 1 - l / 1.6 )         (1)
         ( 1 - l / -1.25 ) * ( 1 - l / 1.6 ) <1         (2)

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    From inequality(1)：
         -5/4 < l < 8/5
    From inequality(2)：
         l < 0 或  l ＞ 7/20

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    From inequalities (1) and (2)
         -5/4 < l < 0 或  7/20 < l < 8/5     (3)

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    The final solution set is :
         -5/4 < l < 0 或  7/20 < l < 8/5

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