论文部分内容阅读
对数函数y=logax(a>0且a≠1)具有性质: (1)当00,x>1时,y<0; (2)当a>1时,01时,y>0. 同学们在利用上述概念解题时,往往容易混淆.如果注意到这两个性质有这样的特点:当底数和真数都在同一区间(0,1)或(1,
The logarithmic function y=logax (a>0 and a≠1) has properties: (1) When 00, x>1, y<0; ( 2) When a>1, 01, y>0. When students use the above concepts to solve problems, they are often confusing. If you notice these two properties have This feature: When both the base number and the true number are in the same interval (0, 1) or (1,