Santo agosrinho
322 palavras
2 páginas
Questão 05.A=[-3 0 -2;4 -5 6;3 -5 11];
>> B=A'
B =
-3.00 4.00 3.00 0 -5.00 -5.00 -2.00 6.00 11.00
>> C=A-B
C =
0 -4.00 -5.00 4.00 0 11.00 5.00 -11.00 0
>> D=A+B
D =
-6.00 4.00 1.00 4.00 -10.00 1.00 1.00 1.00 22.00
>> A(1,:)=[20 -30 -40]
A =
20.00 -30.00 -40.00 4.00 -5.00 6.00 3.00 -5.00 11.00
>> C=A(:,1)
C =
20.00 4.00 3.00
>> C=A(2:3,2:3)
C =
-5.00 6.00 -5.00 11.00.
>> x=[-1 0 2]
x =
-1.00 0 2.00
>> y=[-2 -1 1]
y =
-2.00 -1.00 1.00
>> x*y
??? Error using ==> *
Inner matrix dimensions must agree.
>> x*y'
ans =
4.00
>> C=x+2
C =
1.00 2.00 4.00
>> a=[1 5 8;0 3 4;5 7 1];
>> a=[1 5 8;0 3 4;5 7 1]
a =
1.00 5.00 8.00 0 3.00 4.00 5.00 7.00 1.00
>> size(a)
ans =
3.00 3.00
>> b=inv(a)
b =
0.56 -1.13 0.09 -0.44 0.87 0.09 0.33 -0.40 -0.07
>> c=b*a
c =
1.00 0.00 0.00 0 1.00 -0.00 0 0 1.00
>> c=b/a
c =
0.84 -1.65 -0.06 -0.60 1.22 0.03 0.34 -0.70 -0.00
>> c=b/a
c =
0.84 -1.65 -0.06 -0.60 1.22 0.03 0.34 -0.70