basea.py

Created on February 08, 2023

557 Bytes

Fonction expo de base a log décimal

si 0<a<1 la fonction x-->ax est 
strictement décroissante

si a>1 la fonction est 
strictement croissante

si a=1 la fonction est constante,
égal a 1

si K>0 alors f a 
le meme sens de variation

si K<0 alors f a 
le sens contraire de variation

a0=1  *a1=a  *a**-x=1/a**x

a**x X a**y = a**x+y

(a**x)y=a**xy

(ab)x=ax*bx

(a/b)x=ax/bx

ax/ay=a**x-y


a**n=b<-->a=nracineb


Si 0<a<1 alors log(a)<0
Si a>1 alors log(a)>0

log(ab)=log(a)+log(b)
log(a/b)=log(a)-log(b)
log(1/b)=-log(b)
log(a**n)=n log(a)

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