Question

Calculati x+y+z, -x+y+z, x-y+z si x+y-z in fiecare din cazurile :

a) x=1 , y= -2 , z=4
b) x= -1/2 , y= 1/3 , z= 1/6
c) x=√4 , y= -√9, z= √49
d) x=√16/√36, y= √2 1/4 , z= 2-√3
e) x= √5 , y= -3√5 , z= -√5
f) x= 1+√3 , y= -2√3 , z= 2-√3 ( Ajutatima va rog . Dau Coroana ) :)

Answer 1

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$\sqrt{5}$   -x+y+z=-5$\sqrt{5}$    x-y+z=3$\sqrt{5}$     x+y-z=-$\sqrt{5}$
f) x+y+z=3-2$\sqrt{3}$    -x+y+z=1-4$\sqrt{3}$   x-y+z=3+2$\sqrt{3}$    x+y-z=-1