# Type your text here
#calcul premier terme d'une suite:
#forme explicite
exemple:PourtoutnapartenantaunaturelNUn=3n**2-1U0=3*0**2-1=-1U1=3*1**2-1=2U2=3*2**2-1=11U3=3*3**2-1=26#récurrence,
Vn+1=2Vn-1V0=2V1=2*V0-1=2*2-1=3V2=2*V1-1=2*3-1=5V3=2*V2-1=2*5-1=9V11=2*V10-1V10=2*V9-1---------------U0=2n=0U1=2+2*0=2n=1U2=2+2*1=4n=2U3=4+2*2=8#représentation graphique,
n|Un0|-3-------1|-2,5-------2|-1-------3|1,5-------4|5-------5|9,5-------6|15-------7|21,5Un||25|20|15|10|5|0-------------------n1234567Nepasrelierlespoints#algorithme terme et liste
defterme(n):n=2#premier valeur de la suite
foriinrange(1,n+1):u=0.2*u+1# formule de recurence
return(u)#affichage
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