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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality sqrt（x2-1） <1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sqrt ( x * 2 - 1 ) <1         (1)
        From the definition field of √
         x * 2 - 1 ≥ 0        (2 )

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    From inequality(1)：
         x < 1
    From inequality(2)：
         x ≥ 1/2

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    From inequalities (1) and (2)
         1/2 ≤ x < 1    (3)

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    The final solution set is :
         1/2 ≤ x < 1

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