somme.py

Created by egenspergersara

Created on March 26, 2024

1.19 KB


# Type your text here
Somme de termes arithmétique : 
  
Somme des n premiers entiers 
naturels non nuls : 
k=n
 E k = 1 + 2 + ... + n = n(n+1)
k=1                      ------
                           2
                    
Somme des n+1 premiers termes : 
k=n
 E uk = u0 + u1 + ... + un
k=0   = (n+1)(u0 +un)
             --------
                2 
            
Somme des termes d'indices p à n :
k=n
 E uk = up + up+1 + ... + un
k=p   = (n-p+1)(up + un)
                -------
                   2 
                   
(nbre de x 1er + dernier
 termes)   -------------
                2 
                
Somme des termes géométrique :

Si q diff de 0 et q diff de 1,
k=n
 E q**k = 1 + q + q**2 + ... + q**n
k=0     = 1 - q**n+1
          ----------
            1 - q
            
Somme des n+1 premiers termes :
k=n
 E uk = u0 + u1 + ... + un 
k=0   = u0 x 1 - q**n+1
             ----------
                1 - q
                
Somme des termes d'indices p à n :
k=n
 E uk = up + up+1 + ... + un
k=p   = up x 1 - q**n-p+1
             ------------
                1 - q 
                
(1er terme)x(1-raison**nbre termes)
            -----------------------
                  1 - raison

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