Ngày tải lên :
29/07/2014, 07:20
... a
2
=(2, 0, 1, 1) , a
3
=(3, −4, 0, 1) ,
a
4
= (13 , 10 , 3, −2). (DS. 2a
1
+ a
2
+3a
3
− a
4
= θ; a
1
,a
2
,a
3
)
3) a
1
= (1, 1, 1, 1) , a
2
=(2, 0, 1, 1) , a
3
=(3, 1, 1, 1) ,
a
4
=(4, −2, 1, −2). ... d´ol`adltt.
1) a
1
=(2, 1, −2, 1) , a
2
=(−9, 5, −6, 21) , a
3
=(2, −5, 1, 3),
a
4
=( 1, 1, 1, 5), a
5
=( 1, 2, −3, 4).
(DS. a
1
+ a
2
+ a
3
− 3a
4
−2a
5
= θ; a
1
,a
2
,a
3
,a
4
)
2) a
1
= (1, 1, 1, 1) , ... e
1
+1 e
2
.
Do d
´o
T =
11
0 21
⇒ T
1
=
1 1
01
.
´
Ap du
.
ng cˆong th´u
.
c (11 *) ta c´o
y
1
y
2
= T
1
x
1
x
2
=
1 1
01
1
−2
=
3
−2
.
Do d
´o y
1
=3,y
2
= −2.
V´ı...