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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1389.91*sqrt(1-x^2)+3196.793x <= 1869.2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1389.91 * sqrt ( 1 - x ^ 2 ) + 3196.793 * x <= 1869.2         (1)
        From the definition field of √
         1 - x ^ 2 ≥ 0        (2 )

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    From inequality(1)：
         x ≤ 0.155196
    From inequality(2)：
         -1 ≤ x ≤ 1

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    From inequalities (1) and (2)
         -1 ≤ x ≤ 0.155196    (3)

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    The final solution set is :
         -1 ≤ x ≤ 0.155196

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