a) x+y+z=1-2+4=3 -x+y+z=-1-2+4=1 x-y+z=1+2+4=7 x+y-z=1-2-4=-5
b) x+y+z=-1/2+1/3+1/6=0 -x+y+z=6/6=1 x-y+z=-4/6=-2/3 x+y-z=-1/3
c) x+y+z=2-3+7=6 -x+y+z=-2-3+7=2 x-y+z=2+3+7=12 x+y-z=2-3-7=-8
d) la y lipseste ceva
e) x+y+z=-3[tex] \sqrt{5} [/tex] -x+y+z=-5[tex] \sqrt{5} [/tex] x-y+z=3[tex] \sqrt{5} [/tex] x+y-z=-[tex] \sqrt{5} [/tex]
f) x+y+z=3-2[tex] \sqrt{3} [/tex] -x+y+z=1-4[tex] \sqrt{3} [/tex] x-y+z=3+2[tex] \sqrt{3} [/tex] x+y-z=-1