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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0 ≤log(x^2+1,1) ≤0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0 ≤ log( x ^ 2 + 1 , 1 )         (1)
         log( x ^ 2 + 1 , 1 ) ≤0         (2)
        From the definition field of log
         x ^ 2 + 1 > 0        (3 )
         1 > 0 also ≠ 1        (4 )

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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 ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(3)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(4)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!

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    From inequalities (1) and (2)
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!    (5)
    From inequalities (3) and (5)
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!    (6)
    From inequalities (4) and (6)
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!    (7)

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    The final solution set is :
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!

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