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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1-(1-(10+k)/(50+k))^5 >= 0.85 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1 - ( 1 - ( 10 + k ) / ( 50 + k ) ) ^ 5 >= 0.85         (1)
        From the definition field of divisor
         50 + x ≠ 0        (2 )

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    From inequality(1)：
         k ≤ -50 或  k ≥ √50072907/√700000
    From inequality(2)：
         k < -50 或  k ＞ -50

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    From inequalities (1) and (2)
         k < -50 或  k ≥ √50072907/√700000    (3)

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    The final solution set is :
         k < -50 或  k ≥ √50072907/√700000

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