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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x <1080/x <720/144 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
         x <1080 / x         (1)
        1080 / x <720 / 144         (2)
        From the definition field of divisor
        x ≠ 0        (3 )

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    From inequality(1)：
         x < -√1080 或  0 < x < √1080
    From inequality(2)：
         x < 0
    From inequality(3)：
         x < 0 或  x ＞ 0

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    From inequalities (1) and (2)
         x < -√1080    (4)
    From inequalities (3) and (4)
         x < -√1080    (5)

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    The final solution set is :
         x < -√1080

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