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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 7.28/(0.13×d)+2×9.460.13×d^2+12（2×7.280.13×d+4×9.460.13×d2）2+4×7.2820.132×d2 ≤19.1×1000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        7.28 / ( 0.13 × d ) + 2 × 9.460|13 × d ^ 2 + 12 * ( 2 × 7.280|13 × d + 4 × 9.460|13 × d * 2 ) * 2 + 4 × 7.2820|132 × d * 2 ≤19.1 × 1000         (1)
        From the definition field of divisor
         0.13 × x ≠ 0        (2 )

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    From inequality(1)：
         -125.586966 ≤ d ≤ 8.035619
    From inequality(2)：
         d < 0 或  d ＞ 0

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    From inequalities (1) and (2)
         -125.586966 ≤ d < 0 或  0 < d ≤ 8.035619     (3)

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    The final solution set is :
         -125.586966 ≤ d < 0 或  0 < d ≤ 8.035619

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