摘要
由零点定理判定函数f(x)=ax-logax(0<a<1,x>0)的零点个数,从而得到函数y=ax与函数y=logax的图像的交点个数,它们的交点个数并不唯一.
Using zero point criteria, zeros of the function f（x） = a^x- logaX（0〈a〈1, x〉 0） is determined. Equivalently the number of the intersection points of the graphs y = a^x and y = logox is obtained. It is interesting to know that there are situations for more than one intersection points
出处
《高等数学研究》
2012年第5期43-45,共3页
Studies in College Mathematics
关键词
指数函数
对数函数
零点定理
交点
exponential function, logarithmic function, zero point criteria, intersection point of graphs
