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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (z+4)/(z+5)-(z-9)/(z-5) >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( z + 4 ) / ( z + 5 ) - ( z - 9 ) / ( z - 5 ) >0         (1)
        From the definition field of divisor
         x + 5 ≠ 0        (2 )
        From the definition field of divisor
         x - 5 ≠ 0        (3 )

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    From inequality(1)：
         -25/3 < z < -5 或  z ＞ 5
    From inequality(2)：
         z < -5 或  z ＞ -5
    From inequality(3)：
         z < 5 或  z ＞ 5

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    From inequalities (1) and (2)
         -25/3 < z < -5 或  z ＞ 5    (4)
    From inequalities (3) and (4)
         -25/3 < z < -5 或  z ＞ 5    (5)

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    The final solution set is :
         -25/3 < z < -5 或  z ＞ 5

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