Răspuns:
Explicație pas cu pas:
2x+3<=9 |-3
2x<=6
x<=3
A={1,2,3}
3x+7>=1 |-7
3x>=-6
x>=-2
B={-2,-1,0}
A ∩B=Ф
A={1,2,3}
B={-2,-1,0}
AxB={(1,-2),(1,-1),(1,0),(2,-2),(2,-1), (2,0),(3,-2),(3,-1),(3,0)}
BxA={(-2,1), (-2,2),(-2,3),(-1,1),(-1,2),(-1,3),(0,1),(0,2),(0,3)}
