Réponses

2014-03-06T11:10:41+01:00
2/ A = 3⁵⁺² = 3⁷
B = 7⁴⁻¹ = 7³
C = 10²⁺³ = 10⁵
D = 4³ x 2³ = 2 x 2³ x 2³ = 2¹⁺³⁺³ = 2⁷
E = 4⁵/4² = 4⁵⁻² = 4³
F = (-3)⁴/(-3)² = (-3)⁴⁻² = (-3)²
G = 6²⁻⁵ = 6⁻³
H =
I = (11²)³ = 11⁶ (tu multiplies les puissances)
J = X² x X³ =  X²⁺³ = X⁵
K = a⁵ x a⁻³ = a²
L = x⁷/x³ = x⁷⁻³ = x⁴

3/ M = 5 x 1/2 - 1/3² = 5/2 - 1/9 = (5x9)/(2x9)- (1 x 2)/(9 x 2) = (45 - 2)/ 18
N = 5 x 1/2² + 3 x 2⁻³ = 5/4 + 3/8 = 13/8

4/ 1. pour x = 0, E = 0 ; pour x = 3 E = 9/5 ; pour x = -2 E = 4/5
2. F = x³ - 1 donc pour x = 0, F = 0 - 1 = - 1 ; pour x = 5 F = 125 - 1 = 124 ; pour x = -1 F = -1 - 1 = -2
3.  Soit G = 3x⁵ - 2x² + 4. Pour x = 2/3, G = 3 x 2/3⁵ - 2 x 2/3² + 4
G = 6/3⁵ - 4/9² + 4 = 6/243 - 4/81 + 4 = 6/243 - 12/243 + 972/243 = 966/243