Question

pls e urgent
dau coroana ​

Answer 1

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}