... x4=0,5x 1 +3x2+8x3+ x4 =1. (DS. x 1 = − 14 11 x3+2 11 x4+ 1 11 , x2= −6 11 x3−7 11 x4+2 11 ,x3,x4t`uy ´y)5.3x 1 +5x2+2x3+4x4=3,2x 1 +3x2+4x3+5x4 =1, 5x 1 +9x2− ... 15 3Dx 1 , Dx2, Dx3:Dx 1 = 11 1λ 1 λ2 1 λ= −(λ − 1) 2(λ +1) ,Dx2=λ 11 1 λ 1 1 λ2λ=(λ − 1) 2,Dx3=λ 11 1 ... = 1 11 −242 1 723−3 11 41 1 7h2− 4h 1 → h2h3− 2h 1 → h3h4− 4h 1 → h4−→ 1 11 −206−3 15 05−5 15 05−5 15 h4−...