Trần Thị Kim Ngân 09139107
1.4
>> a=[1 -3 2]
a =
1 -3 2
>> r=roots(a)
r =
2
1
1.6
>> a=[1 -1 2]
a =
1 -1 2
>> r=roots(a)
r =
0.5000 + 1.3229i
0.5000 - 1.3229i
3.5 a
>> a=[1 0 -3 1]
a =
1 0 -3 1
>> r=roots(a)
r =
-1.8794
Trang 21.5321
0.3473
>> a=[3 0 -3 1 -1]
a =
3 0 -3 1 -1
>> r=roots(a)
r =
-1.2229
1.0000
0.1114 + 0.5101i
0.1114 - 0.5101i
>> A=[zeros(4,6)]
A =
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
>> B=[ones(4,5)]
B =
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
Trang 3>> C=[eye(5,5)]
C =
1 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 1 0
0 0 0 0 1
3.7 b
>> A=[1 1 1 1;1 2 3 4;2 3 5 9;1 1 2 7]
A =
1 1 1 1
1 2 3 4
2 3 5 9
1 1 2 7
>> B=[2;2;2;2]
B =
2
2
2
2
>> u=A\B
u =
-2
9
-6
1