BAØI TAÄP HEÄ PHÖÔNG TRÌNH TUYEÁN TÍNH -----*----B/ GIAÛI CAÙC HEÄ PHÖÔNG TRÌNH TUYEÁN TÍNH THUAÀN NHAÁT SAU : 2 x1 x2 4 x3 0 a / 3 x1 5 x2 7 x3 0 4 x 5x 6 x 0 2 3 1 2 x1 x2 5 x3 7 x4 0 b / 4 x1 2 x2 7 x3 5 x4 0 2x x x 5x 0 4 1 2 3 3 x1 2 x2 5 x3 2 x4 7 x5 0 6 x 4 x 7 x 4 x 5 x 0 1 2 3 4 5
c/
3 x1 2 x2 x3 2 x4 11x5 0 6 x1 4 x2 x3 4 x4 13x5 0
6 x1 2 x2 3x3 4 x4 9 x5 0 3x x 2 x 6 x 3x 0 1 2 3 4 5
d/
6 x1 2 x2 5 x3 20 x4 3 x5 0 9 x1 3 x2 4 x3 2 x4 15 x5 0
e/
2 x1 7 x2 4 x3 5 x4 8 x5 0 4 x 4 x 8x 5x 4 x 0 1 2 3 4 5 x1 9 x2 3 x3 5 x4 14 x5 0 3 x1 5 x2 7 x3 5 x4 6 x5 0
2 x1 3 x2 x3 5 x4 0 3x 2 x 2 x 7 x 0 1 2 3 4
f/
4 x1 x2 3 x3 6 x4 0 x1 2 x2 4 x3 7 x4 0
3x1 4 x2 5 x3 7 x4 0 2 x 3x 3 x 2 x 0 1 2 3 4
g/
4 x1 11x2 13 x3 16 x4 0 7 x1 2 x2 x3 3x4 0
x1 2 x2 x3 x4 x5 0 2x x x x x 0 1 2 3 4 5
h/
x1 7 x2 5 x3 5 x4 5 x5 0 3x1 x2 2 x3 x4 x5 0
3 x1 x2 x3 2 x4 x5 0 x x 2 x 4 x 5x 0 1 2 3 4 5
i/
x1 x2 3 x3 6 x4 9 x5 0 12 x1 2 x2 x3 2 x4 10 x5 0 6 x1 3x2 4 x3 3 x4 0 3x 2 x 3 x 0 1 3 5
j/
9 x1 3x2 6 x3 3x4 3 x5 0 12 x1 6 x2 8 x3 6 x4 0
k/
2 x1 4 x2 5 x3 3 x4 0 3x 6 x 4 x 2 x 0 1 2 3 4 4 x1 8 x2 17 x3 11x4 0 6 x1 12 x2 8 x3 4 x4 0