Se A e B são matrizes tais que:
A=
|2|
|1 |
|x |
B=
1
2
1 então a matriz y= A^t . B será nula para:
a)x= 0
b)x= -1
c)x= -2
d)x= -3
e)x= -4
A^t = [2 1 x]
B =
A^t*B = x + 4
y = x + 4 = 0
x = -4 (E)
pronto
A^t =( 2 1 x ) x 1 = 2+2+x = 0 ==> x = - 4, resp. E
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Verified answer
A^t = [2 1 x]
B =
1
2
1
A^t*B = x + 4
y = x + 4 = 0
x = -4 (E)
pronto
A^t =( 2 1 x ) x 1 = 2+2+x = 0 ==> x = - 4, resp. E
. . . . . . . . . . . .2
, , , , , , , , , , , ,1