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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (197n+20n^2)*(197n+13.4n^2)/(394+40n)+556*(1.9+n)-980-317n-1.2[(110n+3.9n^2)*(110n+2.6n^2)/(220+7n)+24*(14+n)+36*(11+n)+208*(7.4+n)+728*(2.7+n) ) >= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 197 * n + 20 * n ^ 2 ) * ( 197 * n + 13.4 * n ^ 2 ) / ( 394 + 40 * n ) + 556 * ( 1.9 + n ) - 980 - 317 * n - 1.2 * ( ( 110 * n + 3.9 * n ^ 2 ) * ( 110 * n + 2.6 * n ^ 2 ) / ( 220 + 7 * n ) + 24 * ( 14 + n ) + 36 * ( 11 + n ) + 208 * ( 7.4 + n ) + 728 * ( 2.7 + n ) ) >= 0         (1)
        From the definition field of divisor
         394 + 40 * x ≠ 0        (2 )
        From the definition field of divisor
         220 + 7 * x ≠ 0        (3 )

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    From inequality(1)：
         -31.428571 ≤ n ≤ -30.796715 或  -15.221878 ≤ n ≤ -5.027687 或  n ≥ 13.458464
    From inequality(2)：
         n < -197/20 或  n ＞ -197/20
    From inequality(3)：
         n < -220/7 或  n ＞ -220/7

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    From inequalities (1) and (2)
         -31.428571 ≤ n ≤ -30.796715 或  -15.221878 ≤ n < -197/20 或  -197/20 < n ≤ -5.027687 或  n ≥ 13.458464    (4)
    From inequalities (3) and (4)
         -220/7 < n ≤ -30.796715 或  -15.221878 ≤ n < -197/20 或  -197/20 < n ≤ -5.027687 或  n ≥ 13.458464    (5)

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    The final solution set is :
         -220/7 < n ≤ -30.796715 或  -15.221878 ≤ n < -197/20 或  -197/20 < n ≤ -5.027687 或  n ≥ 13.458464

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