Réponse :
Explications étape par étape
Exercice 1
U0= 2*0²-1=-1
U1= 2*1²-1= 2-1=1
U2 = 2*2²-1=2*4-1 = 8 -1 = 7
U10 = 2 * 10² -1 = 200 - 1 = 199
Exercice 4
W0 = 1
1) W1 = 2w0²+1 = 2 *1 + 1 = 3
W2 = 2 W1²+ 1 = 2 * 3² + 1 = 18 + 1 = 19
W3 = 2 W2² + 1 = 2 * 19² + 1 = 723
2) Wn+1 = 2 Wn² + 1
