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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x+0.45*sqrt(0.9+x) ≤0.7269074841227312098198506284984170020521 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x + 0.45 * sqrt ( 0.9 + x ) ≤0.7269074841227312098198506284984170020521         (1)
        From the definition field of √
         0.9 + x ≥ 0        (2 )

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    From inequality(1)：
         x ≤ 0.245319
    From inequality(2)：
         x ≥ -9/10

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    From inequalities (1) and (2)
         -9/10 ≤ x ≤ 0.245319    (3)

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    The final solution set is :
         -9/10 ≤ x ≤ 0.245319

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