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

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

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    From inequality(1)：
         x < -0.416667 或  x ＞ -0.333333
    From inequality(2)：
         x < -1/3 或  x ＞ -1/3

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    From inequalities (1) and (2)
         x < -0.416667 或  x ＞ -0.333333    (3)

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    The final solution set is :
         x < -0.416667 或  x ＞ -0.333333

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