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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （2.78*x）²+（1400+x）² ≥2（2.78*x）（1400+x） .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 2.78 * x ) ^ 2 + ( 1400 + x ) ^ 2 ≥2 * ( 2.78 * x ) * ( 1400 + x )         (1)

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    From inequality(1)：
         x ≤ 786.516845 或  786.516845 ≤ x ≤ 786.516845 或  x ≥ 786.516845

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    The final solution set is :
         x ≤ 786.516845 或  786.516845 ≤ x ≤ 786.516845 或  x ≥ 786.516845

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