4. 2,14=2,1400
2,1(4)=2,1444
2,(14)=2,1414
2,144=2,1440
2,14<2,(14)<2,144<2,1(4)
c)
5. mₐ=[8√3+3√3+(-17√3)]/3
mₐ=(11√3-17√3)/3
mₐ=(-6√3)/3
mₐ= -2√3
Are dreptate Nicolae.