etudefonction.py

Created by mathoulde1406

Created on December 18, 2023

695 Bytes

- determiner un ensemble de definition 
1 trouver ou ca fait 0
2 ]-inf,x[u]x,+inf]
denominateur non nul(ex:4+xdonc x#-4)
donc DF=]-inf,-4[u]4,+inf[

-dterminer fonction pai ou impair
1 on remplace x par -x
2 e^x ni pair ni impairvu que les 
courbes ne se superpose pas
3 cos(x)=cos(-x)
4 sin(-x)=-sin(x)

-montrer qu'une fonction est periodique 
 f(x+T)=f(x)
1 pour tout x,sin(x+2Kpie)=sin(x)
pareil cos
2 T=2pie/wo

- calculer une derivé ( voir derivé)
1 cos2(x)+sin2(x)=1
2 montrer qu'une fonction s'annule avec 
valeur on la remplace par x 
3 le sign eon cherche une inégalité
(f(x)sup0)
4 "d" peut vouloir dire derivé

- la frequence c'est l'inverse de la periode

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