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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -1 <(1-x)(2*x^2-5*x+1) <1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -1 < ( 1 - x ) * ( 2 * x ^ 2 - 5 * x + 1 )         (1)
         ( 1 - x ) * ( 2 * x ^ 2 - 5 * x + 1 ) <1         (2)

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    From inequality(1)：
         x < 2.437565
    From inequality(2)：
         0 < x < 3/2 或  x ＞ 2

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    From inequalities (1) and (2)
         0 < x < 3/2 或  2 < x < 2.437565     (3)

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    The final solution set is :
         0 < x < 3/2 或  2 < x < 2.437565

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