Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 0 <2240/x <1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0 <2240 / x         (1)
        2240 / x <1         (2)
        From the definition field of divisor
        x ≠ 0        (3 )

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

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    From inequalities (1) and (2)
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!    (4)
    From inequalities (3) and (4)
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!    (5)

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    The final solution set is :
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!
[ 2/2Inequality]
    Assignment:Find the solution set of inequality x <1280/140+1.8 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x <1280 / 140 + 1.8         (1)

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    From inequality(1)：
         x < 10.942857

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    The final solution set is :
         x < 10.942857

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