Question

Fie multimile A= {+3,-4,+2,-5,0}
B={-7,+2,-5+4,+3}
C={x apartineZ| |x| apartine A}
D={x apartine Z | |x| apartine B}

Answer 1

C={+3,-3,+2,-2,0}

D={+2,-2,+3,-3,+4,-4)

|x|=x, -x

C∩D={-3, -2, +2, +3}