Question

1. |2x+6|<=7
2. |a+2| <= 5
3. |3r-5|>=4
4. |-n+ 1|>= 12
5. |k-2|<= 6

Answer 1

Respuesta:

1. x1= 1/2, x2= -13/2

2. aE[-7,3]

3. rE[-infinito,1/3] U [3,+infinito]

4. nE[-infinito, -11] U [13,+infinito]

5. kE[-4,8]