zelal.py

Created by keremozke

Created on May 05, 2024

654 Bytes

formule=
Un=Uo+Rxn
Up=Un+rx(p-n)
Un=Up+rx(n-p)
1+2+3+...+N=nx(n+1)sur2
ex=
r=1sur4 Uo=5,5
U12=Uo+rx12

r=1sur3   V4=-8
V16=V4+r(16-4)
La suite (u n ) est arithmétique
de raison r=3 et telle que u 7=12.
U20=U7+rx(20-7)

À chaque fois, on donne deux termes d'une suite arithmétique (u n
 ) définie sur N. Déterminer la raison et le premier terme puis exprimer u 
nen fonction de n∈N.
u3=4 et u8=24.
U8=U3+rx(8-3)
24=4+5xr
20=5xr
4=r
-Uo=U3+rx(0-3)

 S=1+2+3+...+73.
 73(73+1)sur2
 T=1+4+7+...+40.
 1x14+3x(1+2+3+..+12+13)
 14+3x13x(13+1)sur2=14+3x13x7
  U=71+72+73+...+100.
  5050-2485
  V=2+4+6+...+50.
  1+(1+3x1)+1(1+3x2)+..(x13)

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