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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 2 ≤2^(k-1) ≤1000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        2 ≤2 ^ ( k - 1 )         (1)
        2 ^ ( k - 1 ) ≤1000         (2)

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    From inequality(1)：
         k ≥ 2
    From inequality(2)：
         k ≤ 10.965784

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    From inequalities (1) and (2)
         2 ≤ k ≤ 10.965784    (3)

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    The final solution set is :
         2 ≤ k ≤ 10.965784

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