Question

Reprezinta fiecare multime prin enumerarea elementelor sale
D={x|x€N,x+3=4
€=ii apartine dau coroana

Answer 1

x+3=4
x=4-3
x=1
R:S={1}

Answer 2

x+3=4 => x= 4-3=1
multimea are un element
D= {1}