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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1330+30*b^2)/b^2 <= 300 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1330 + 30 * b ^ 2 ) / b ^ 2 <= 300         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

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    From inequality(1)：
         b ≤ -√133/√27 或  b ≥ √133/√27
    From inequality(2)：
         b < 0 或  b ＞ 0

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    From inequalities (1) and (2)
         b ≤ -√133/√27 或  b ≥ √133/√27    (3)

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    The final solution set is :
         b ≤ -√133/√27 或  b ≥ √133/√27

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