deriveefonction.py

Created by mbtp07

Created on March 30, 2021

807 Bytes


fonction f est strictement croissante alors f'x sup ou egal 0
fonction f est strictement decroissante alors f'x inf=0
fonction f est constante alors f'x=0
si f'(x) supegal 0 et que changement de variation alors f croissante
etc pour le reste

Pour trouver variation f : dérivé f trouver signe f'x en déduire var
Pour quotient ou calculs compliqués découper la fonction
extremums calculer f(x) après avoir fait second degré

RAPPELS AU CAS OU :
  delta = b^2-4ac
  x1= -b-delta/2a
  x2= -b+delta/2a
  x0= -b/2a
  
  Equation de tangeante :f'(a)*(x-a)+f(a)
  Periodicité calculer f(x+la periode
  
Exemple de demontrer suites geo 
wn=vn-4000 montrer geo r=0.95
vn+1=0.95vn+200

wn+1=0.95vn+200-4000
= 0.95vn-3800
=0.95(vn-(3800/0.95))
=0.95(vn-4000)
=0.95wn
donc geo raison 0.95

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