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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality ((x+1)(x-1)(x^2+1))/(x-2) <= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( ( x + 1 ) * ( x - 1 ) * ( x ^ 2 + 1 ) ) / ( x - 2 ) <= 0         (1)
        From the definition field of divisor
         x - 2 ≠ 0        (2 )

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    From inequality(1)：
         x ≤ -1 或  1 ≤ x ≤ 2
    From inequality(2)：
         x < 2 或  x ＞ 2

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

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

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