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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 18k/(4-9k^2) <-6 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        18 * k / ( 4 - 9 * k ^ 2 ) < -6         (1)
        From the definition field of divisor
         4 - 9 * x ^ 2 ≠ 0        (2 )

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    From inequality(1)：
         -0.666667 < k < -0.520518 或  0.666667 < k < 0.853851
    From inequality(2)：
         k < -2/3 或  -2/3 < k < 2/3 或  k ＞ 2/3

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    From inequalities (1) and (2)
         -0.666667 < k < -0.520518 或  k < -2/3 或  0.666667 < k < 0.853851     (3)

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    The final solution set is :
         -0.666667 < k < -0.520518 或  k < -2/3 或  0.666667 < k < 0.853851

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