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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -1 <-3x^2+10x-7 <1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -1 < -3 * x ^ 2 + 10 * x - 7         (1)
         -3 * x ^ 2 + 10 * x - 7 <1         (2)

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    From inequality(1)：
         0.78475 < x < 2.548584
    From inequality(2)：
         x < 4/3 或  x ＞ 2

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    From inequalities (1) and (2)
         0.78475 < x < 4/3 或  2 < x < 2.548584     (3)

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    The final solution set is :
         0.78475 < x < 4/3 或  2 < x < 2.548584

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