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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality sqrt(1-8x) ≥7 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sqrt ( 1 - 8 * x ) ≥7         (1)
        From the definition field of √
         1 - 8 * x ≥ 0        (2 )

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    From inequality(1)：
         x ≤ -6
    From inequality(2)：
         x ≤ 1/8

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    From inequalities (1) and (2)
         x ≤ -6    (3)

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    The final solution set is :
         x ≤ -6

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