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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1.7*3.8)/[1.7*1.7-(1.2x-1.5)*(6.3-1.2x)] ≤9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1.7 * 3.8 ) / ( 1.7 * 1.7 - ( 1.2 * x - 1.5 ) * ( 6.3 - 1.2 * x ) ) ≤9         (1)
        From the definition field of divisor
         1.7 * 1.7 - ( 1.2 * x - 1.5 ) * ( 6.3 - 1.2 * x ) ≠ 0        (2 )

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    From inequality(1)：
         x ≤ 1.671547 或  1.838244 ≤ x ≤ 4.661756 或  x ≥ 4.828453
    From inequality(2)：
         x < 1.838244 或  1.838244 < x < 4.661756 或  x ＞ 4.661756

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    From inequalities (1) and (2)
         x ≤ 1.671547 或  1.838244 < x < 4.661756 或  x ≥ 4.828453    (3)

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    The final solution set is :
         x ≤ 1.671547 或  1.838244 < x < 4.661756 或  x ≥ 4.828453

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