maths1.py

Created by mbtp07

Created on February 22, 2021

398 Bytes

Devoir aide Suite

Sommes:
suites arithmetique:
 n= (1+n)*n/2
 Un= (Un+Uk)/2*(n-k+1)
 = (dernier termes+1er terme)/2*(nb de terme
 
 
 suites geometrique:
   q**n=1+q**n+1/1-q
   Vn=V0*(1-q**n+1/1-q)
   
   suite arithmetique:
     
   Un+1=Un+ r
   
   exemple 1- Un=3n-2.

Un+1 – Un= 3(n+1)-2-(3n-2)
= 3n+3-2-3n+2 
= 3 donc (Un) est une 
suite arithmétique de raison 3.

suite geometrique:
  Un+1/Un

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