Réponse :
Explications étape par étape :
Bonsoir
a.A = 123546 = 1,23546 × 10⁵
b.B = 5121,1×10^780 = 5,1211 × 10⁷⁸³
c.C =14×10^4×75×10^-7 / 35×10^-3 = (14 ×75)/ 35 × 10⁴ × 10⁻⁷/ 10⁻³
C = (2×7×5×15)/(7×5) × 10⁴⁻⁷ /10⁻³
C = 30 × 10⁻³ / 10⁻³
C = 30 × 10⁻³⁻⁽⁻³⁾
C = 30 × 10⁻³⁺³
C = 30 × 10⁰ (10⁰=1)
C = 30 × 1
C = 30
C = 3 × 10¹
d.D = 33×10^-3×8×(10^5)^2 / 12×10^2
D = (33 × 8) / 12 × 10⁻³ ×10¹⁰/10²
D = ( 3×11×4×2)/(3×4) × 10⁻³⁺¹⁰/10²
D = 22 × 10⁷ / 10²
D = 22 × 10⁷⁻²
D = 22 × 10⁵
D = 2,2 × 10⁶
