geo.py

Created by thomas-66

Created on October 17, 2023

734 Bytes


suite geometrique

montrer que une suite est geo
essayer de factoriser pour obtenir 
un resultat de cette forme
Un+1 = qUn

montrer que une suite nest pas geo
u1/u0 pas egal a u2/u1

terme en fonction dun autre 
q = raison et on a pour Entier
n et p , Un = Up*q**(n-p)

terme u0 un= u0 q**n
terme u1 n>1 Un=u1*q**(n-1)

sens variation :

q>1 strictement croissan un0>0
et srictement decroisant si un0<0
 
0<q<1 strictement croissant un0<0
et strictement decroi un0>0

q<0 suite alterne et pas Monotone

q=0 suite constant = 0

q=1 suite constante = a un0

somme terme consequtif

cas particulier : (1-q**(n+1))/(1-q)

cas general : premier terme * 1-(raison)**nombre de terme/1-raison

cas frequent : u0*(1-q**(n+1))/(1-q)

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