Question

Pentru a=0 rezolvați sistemul :

{ax + y + z =1
{ x + ay + z =1
{ x + y +az =1

Answer 1

y+z=1

x+z=1

x+y=1

________

2x+2y+2z=3

2(x+y+z)=3

x+y+z=3/2

x+y =1

z =3/2-1

z=3/2-2/2=>z=1/2

y+z=1=>y=1-z=1-1/2=2/2-1/2=1/2

x+y=1=>x=1-y=1-1/2=2/2-1/2=1/2

S={(1/2, 1/2, 1/2)}

Answer 2

Vezi poza atasata!!!!!!!!!!