... + 2 V , 1V ∩ 2 V . a) 4dim,2dim,1dim,2dim 21 2 121 =+=∩== VVVVVV. b) 3dim,1dim,1dim,2dim 21 2 121 =+=∩== VVVVVV . c) 4dim,2dim,2dim,2dim 21 2 121 =+=∩== VVVVVV . d) 3dim,1dim,2dim,2dim 21 2 121 =+=∩== ... 1V ∩ 2 V . a) 4dim,2dim,1dim,2dim 21 2 121 =+=∩== VVVVVV . b) 3dim,1dim,2dim,2dim 21 2 121 =+=∩== VVVVVV . Chng 5: H phng trình tuyn tính 68c) 2dim,2dim,2dim,2dim 21 2 121 =+=∩== ... 62 Câu 12: Gii h phng trình tuyn tính ⎪⎪⎩⎪⎪⎨⎧=+−−=−+−=+−−=−+−54 32 16 52 23 22 4 32 4 321 4 321 4 321 4 321 xxxxxxxxxxxxxxxx a) 43 424 1 24 ,23 ,21 xxxxxx−=−=+= . b) 43 421 52, 71,0...