Question

se consideră multimile B={y€N/y=2x+1,x€A}cum se rezolva A={x€N/x,-cifra impara

Answer 1

A = {1,3,5,7,9}
y= 2*1+1=2+1=3
y=2*3+1=6+1=7
y=2*5+1=11
y=2*7+1=15
y=2*9+1=19
B={3,7,11,15,19}