Răspuns:
R
Explicație pas cu pas:
A x aparține Z (3x+8)/(2x-5) aparține Z
1)2x-5=±1. x1=6. x2=4
3x+8=±(2x-5)
3x+8=2x-5. x3=-13
3x+8=-2x+5. x4=-3/5 ≠Z
A={-13;4;6}
B x=Z. 11/(x+2)=Z
x+2=±1 x1=-1. x2=-3
x+2=±11. x3=9. x4=-13
a)B={-13;-3;-1;9}
A={-13;4;6}
b)AnB={-13}
AUB={-13-3;-1;4;6;9}
A\B={4;6}
B\A={-3;-1;9}
