Question

Scrieti elementele multimilor:

A = {x apartine N | 3x < sau = cu 9 } =

B = {x apartine Z | |x| = 5 } =

C = {x apartine Z | |x| < sau = 2 } =

Answer 1

Multimea A={0,1,2,3}
Multimea B={-5,5}
Multimea C={-2,-1,0,1,2}

Answer 2

3x≤9⇒x≤3⇔x=[0,1,2,3];
⇒A=[0,1,2,3];
x=[-5,5];
⇒B=[-5,5];
x=[-2,2,-1,1];
⇒C=[-2,2,-1,1];