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