Metodos Numericos

>> a=[1 1 1 1;1 1 0 1;2 2 3 0;-1 -1 -2 2]

a =

1 1 1 1
1 1 0 1
2 2 3 0
-1 -1 -2 2

>> b=[7;8;10;0]

b =

7
810
0

>> rank(a)

ans =

3

>> rank([a b])

ans =

4

>> a=[1 6 8;4 17 12; 7 28 16;4 10 -8]

a =

1 6 8
4 17 12
7 28 164 10 -8

>> b=[19;42;65;8]

b =

19
42
65
8

>> c=[1 6;4 17]

c =

1 6
4 17

>> c=Inv(C)
??? Undefined function or variable 'C'.

>>c=Inv(c)
??? Undefined function or method 'Inv' for input arguments of
type 'double'.

>> c=inv(c)

c =

-2.4286 0.8571
0.5714 -0.1429

>> format rat
>> c=inv(c)

c =1 6
4 17

>> c=inv(c)

c =

-17/7 6/7
4/7 -1/7

>> G=[-17/7 6/7 0 0;4/7 -1/7 0 0; 0 0 0 0]

G =-17/7 6/7 0 0
4/7 -1/7 0 0
0 0 0 0

>> I=eye(3)I =

1 0 0
0 1 0
0 0 1

>> Z=[1;-1;1]

Z =

1-1
1

>> x=[a*b]
??? Error using ==> mtimes
Inner matrix dimensions must agree.

>> x=a*b
??? Error using ==> mtimes
Inner matrix dimensions must agree.

>> x=G*bx =

-71/7
34/7
0

>> a*x

ans =

19
42
65
8

>> x1=+(G*a-I)*Z

x1 =

-64/720/7
-1

>> x1=x+(G*a-I)*Z

x1 =

-135/7
54/7
-1

>> a*x1

ans =

19
42
65
8...