Consider a 2 × 2 matrix A with A 2 = A . a. If w → is in the image of A. what is the relationshipbetween w → and A w → ? b. What can you say about A if r a n k ( A ) = 2 ? What if r a n k ( A ) = 0 ? c. If r a n k ( A ) = 1 show that the linear transformation T ( x → ) = A x → . is the projection onto im(A) alongker(A). See Exercise 2.2.33.
Consider a 2 × 2 matrix A with A 2 = A . a. If w → is in the image of A. what is the relationshipbetween w → and A w → ? b. What can you say about A if r a n k ( A ) = 2 ? What if r a n k ( A ) = 0 ? c. If r a n k ( A ) = 1 show that the linear transformation T ( x → ) = A x → . is the projection onto im(A) alongker(A). See Exercise 2.2.33.
Consider a
2
×
2
matrix A with
A
2
=
A
. a. If
w
→
is in the image of A. what is the relationshipbetween
w
→
and
A
w
→
? b. What can you say about A if
r
a
n
k
(
A
)
=
2
? What if
r
a
n
k
(
A
)
=
0
? c. If
r
a
n
k
(
A
)
=
1
show that the linear transformation
T
(
x
→
)
=
A
x
→
. is the projection onto im(A) alongker(A). See Exercise 2.2.33.
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