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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality n+2 <= 242/(3n+3) <= n+4 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
         n + 2 <= 242 / ( 3 * n + 3 )         (1)
         242 / ( 3 * n + 3 ) <= n + 4         (2)
        From the definition field of divisor
         3 * x + 3 ≠ 0        (3 )

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    From inequality(1)：
         n ≤ -10.495369 或  -1 ≤ n ≤ 7.495369
    From inequality(2)：
         -11.605859 ≤ n ≤ -1 或  n ≥ 6.605859
    From inequality(3)：
         n < -1 或  n ＞ -1

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    From inequalities (1) and (2)
         -11.605859 ≤ n ≤ -10.495369 或  6.605859 ≤ n ≤ 7.495369    (4)
    From inequalities (3) and (4)
         -11.605859 ≤ n ≤ -10.495369 或  6.605859 ≤ n ≤ 7.495369    (5)

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    The final solution set is :
         -11.605859 ≤ n ≤ -10.495369 或  6.605859 ≤ n ≤ 7.495369

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