Question

determina elementele multimii B={2x+3/x E N si x este cifra para]

Answer 1

B={2x=3| x∈N ,2|x}
x=0 => 2x+3=3
x=2 => 2x+3=7
x=4 => 2x+3=11
x=6 => 2x+3=15
x=8 => 2x+3=19
=> B={3,7,11,15,19}