Bonjour
Résoudre :
x - 2 << 0
x << 2
x + 4 > 0
x > -4
2x + 7 > 0
2x > -7
x > -7/2
(1 - 3x)/4 >> 0
1/4 - 3x/4 >> 0
3x/4 << 1/4
x << 1/4 * 4/3
x << 1/3
3x - 3 < 1 - 2x
3x + 2x < 1 + 3
5x < 4
x < 4/5
Réponse:
EXERCICE 1:
1)
x-2<= 0
x<=2
2)
x+4>0
x>-4
3) 2x+7 >0 , 2x>-7 , x> -7/2
4)
1-3x / 4 >=0
-3x/4 >= -1/4
-3x>= -1
x<= 1/3
5)
3x-3<1-2x
-4 < -5x
4/5 >x
