Sagot :
bonjour
48 = 2 x 24
24 = 2 x 12
12 = 2 x 6
6 = 2 x 3
3 = 3 x 1
48 = 2 ⁴ x 3
75 = 3 x 25
25 = 5 x 5
5 = 5 x 1
75 = 3 x 5 ²
donc 48/75 = 16/ 25
360 = 2 ³ x 3 ² x 5
252 = 2² x 3 ² x 7
360/252 = 10 / 7
Bonjour,
1)
A = 48 = 2 * 2 * 2 * 2 * 3 = 2⁴ * 3
B = 75 = 3 * 5 * 5 = 3 * 5²
C = 360 = 2 * 2 * 2 * 3 * 3 * 5 = 2³ * 3² * 5
D = 252 = 2 * 2 * 3 * 3 * 7 = 2² * 3² * 7
2)
a) 48/75
on trouve un diviseur commun de 48 et 75.
PGDC(48;75) = 3
48/75 = 48 ÷ 3 / 75 ÷ 3 = 16/25
b) 360/252
PGDC(360;252) = 3² * 2² = 9 * 4 = 36
360/252 = 360 ÷ 36 / 252 ÷ 36 = 10/7