A=[-3;√5] A egal -3 inchis, radical 5 inchissau -3 , radical 5 inchis la ambele capete
B=[1/3;∞) B egal 1/3 inchis, infinit
C=(1;π) Cegal 1, pi, deschis a ambele capete
D=(-∞;-2) D egal mimus infinit, minus 2, deschis
E=(-5;5] W egal minus 5 deschis, 5 inchis