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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -1 ≤-（x-1/2）^2+13/4 ≤1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -1 ≤ - ( x - 1 / 2 ) ^ 2 + 13 / 4         (1)
         - ( x - 1 / 2 ) ^ 2 + 13 / 4 ≤1         (2)

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    From inequality(1)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
         x ≤ -1 或  x ≥ 2

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    From inequalities (1) and (2)
         x ≤ -1 或  x ≥ 2    (3)

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    The final solution set is :
         x ≤ -1 或  x ≥ 2

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