Ln is an operator, which means to find the natural logarithm, that is, the logarithm based on e.
E is a constant, equal to 2.7 1828 183…
Lnx can be understood as ln(x), that is, the logarithm of x with the base of e, that is, how many powers of e are equal to X.
lnx=loge^x
The image of y=lnx is as follows:
Extended data:
Derivation formula of logarithm:
( 1)log( 1/a)( 1/b)=log(a^- 1)(b^- 1)=- 1logab/- 1=loga(b)
(2)loga(b)*logb(a)= 1
(3)loge(x)=ln(x)
(4)lg(x)=log 10(x)
Logs (a) and (b) represent logarithms based on b.
Extension of base exchange formula: replace the formula with base E and base A: logae= 1/(lna)