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一、不越位,坚守自己的职责范围对数函数y=logax的底数a是一个不等于1的正数.例1求函数y=log(x-1)3的定义域.解因为对数函数的底数要大于0且不等于1,所以x-1>0且x-1≠1,即x>1且x≠2.所以函数y=log(x-1)3的定义域为
First, not offside, adhere to their duties Logarithm function y = logax the base a is a positive number not equal to 1. Example 1 Find the function y = domain of log (x-1) 3 solution because the logarithmic function The base of the function y = log (x-1) 3 is defined as follows: x-1> 0 and x-1 ≠ 1, ie x> 1 and x ≠ 2. The definition of the function y =