bonjour
T = 7 x 10 ⁴ : 21 x 10 ³
= 7/21 x 10
= 1/3 x 10
U = 84 x 10 ⁷ : 168 x 10 ³
= 1/2 x 10 ⁴
V = 4 x 10 ⁻⁶ x 10 ² : 12 x 10 ⁻³
= 4 x 10 ⁻⁴ : 12 x 10 ⁻³
= 1 /3 x 10 ⁻¹
W= 1.5 x 10 ⁻⁵ x 2 ² x 10 ⁶ : 0.14 x 10 ²
= 6 x 10 : 0.14 x 10 ²
= 600 /14 x 10 ⁻¹
= 300/7 x 10 ⁻¹
