suitearithmetique.py

Created on January 16, 2022

482 Bytes

# formule de récurrence :
# u_n+1=u_n+r
#
# expression explicite :
#u_n=u_0+nr
#
#somme de termes consécutifs :
# si terme consécutif :
# S= (nb de termes * (1er terme + dernier terme))/2
# 
# pour tout nombre naturel n non nul :
# 1+2+...+n=((n(n+1))/2

# sens de variation
# r>0     u est croissante
# r<0     u est décroissante
# r=0     u est constante/ monotone

# au lieu d'utiliser un système
# u_n=u_p+(n-p)*r
# u_p= plus petit terme (indice)

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