A-Level数学例题解析及练习Natural logarithms

今日知识点：Natural logarithms

Definition and graph：

e ≈ 2⋅7183 and logs to base eare called natural logarithms.

log e x is usually written ln x.

Notethat y=ex and y=lnx

are inverse functions and that the graph of one is the reflection of the other in the line y = x.

Graph of y = e(ax + b) + c.

The graph of y = e2x is the graph ofy = ex