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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3-a     Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3 - a < log( 2 , 15 - a )         (1)
        From the definition field of log
         2 > 0        (2 )
         15 - x > 0 并且 ≠ 1        (3 )

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    From inequality(1)：
         a ＞ -1
    From inequality(2)：
         a ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(3)：
         a < 14 或  14 < a < 15

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    From inequalities (1) and (2)
         a ＞ -1    (4)
    From inequalities (3) and (4)
         -1 < a < 14 或  14 < a < 15     (5)

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    The final solution set is :
         -1 < a < 14 或  14 < a < 15

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