Resolva os sistemas abaixo pelo método do escalonamento
A) x+2y+z=7
2x+7y+z=21
-3x-5y+2z= -8
B) X+y+z=9
3x+5y+6z=45
4x+8y+11z=76
ajudaaaaa pfvrrrrrrrrr
Respostas
A)
1 2 1 7
2 7 1 21
-3 -5 2 -8
L2=L2-2L1
L3=L3+3L1
1 2 1 7
0 3 -1 7
0 1 5 13 21-8
L2=L2-3L3 -1-15
1 2 1 7
0 0 -16 -32
0 1 5 13
L2=L2/(-16)
1 2 1 7
0 0 1 2
0 1 5 13
L3=L3-5L2
1 2 1 7
0 0 1 2
0 1 0 3
L1=L1-L2
1 2 0 5
0 0 1 2
0 1 0 3
L1=L1-2L3
1 0 0 -1
0 0 1 2
0 1 0 3
L2<>L3
1 0 0 -1 ==>x=-1
0 1 0 3 ==>y=3
0 0 1 2 ==>z=2
B)
1 1 1 9
3 5 6 45
4 8 11 76
L2=L2-3L1
L3=L3-4L1
1 1 1 9
0 2 3 18
0 4 7 40
L3=L3-2L2
1 1 1 9
0 2 3 18
0 0 1 4
L1=L1-L3
L2=L2-3L3
1 1 0 5
0 2 0 6
0 0 1 4
L2=L2/2
1 1 0 5
0 1 0 3
0 0 1 4
L1=L1-L2
1 0 0 2 ==>x=2
0 1 0 3 ==>y=3
0 0 1 4 ==> z=4