Linear Transformation and Bases In Exercises 25-28, let T : R 3 → R 3 be a linear transformation such that T ( 1 , 0 , 0 ) = ( 2 , 4 , - 1 ) , T ( 0 , 1 , 0 ) = ( 1 , 3 , - 2 ) , and T ( 0 , 0 , 1 ) = ( 0 , - 2 , 2 ) . Find the specified image. T ( 1 , − 3 , 0 )
Linear Transformation and Bases In Exercises 25-28, let T : R 3 → R 3 be a linear transformation such that T ( 1 , 0 , 0 ) = ( 2 , 4 , - 1 ) , T ( 0 , 1 , 0 ) = ( 1 , 3 , - 2 ) , and T ( 0 , 0 , 1 ) = ( 0 , - 2 , 2 ) . Find the specified image. T ( 1 , − 3 , 0 )
Solution Summary: The author explains how the vector (1,-3,0) can be written as a vector.
Linear Transformation and BasesIn Exercises 25-28, let
T
:
R
3
→
R
3
be a linear transformation such that
T
(
1
,
0
,
0
)
=
(
2
,
4
,
-
1
)
,
T
(
0
,
1
,
0
)
=
(
1
,
3
,
-
2
)
, and
T
(
0
,
0
,
1
)
=
(
0
,
-
2
,
2
)
. Find the specified image.
Let
2
A =
4
3
-4
0
1
(a) Show that v =
eigenvalue.
()
is an eigenvector of A and find the corresponding
(b) Find the characteristic polynomial of A and factorise it. Hint: the answer to (a)
may be useful.
(c) Determine all eigenvalues of A and find bases for the corresponding eigenspaces.
(d) Find an invertible matrix P and a diagonal matrix D such that P-¹AP = D.
(c) Let
6
0 0
A =
-10 4 8
5 1 2
(i) Find the characteristic polynomial of A and factorise it.
(ii) Determine all eigenvalues of A and find bases for the corresponding
eigenspaces.
(iii) Is A diagonalisable? Give reasons for your answer.
most 2, and let
Let P2 denote the vector space of polynomials of degree at
D: P2➡ P2
be the transformation that sends a polynomial p(t) = at² + bt+c in P2 to its derivative
p'(t)
2at+b, that is,
D(p) = p'.
(a) Prove that D is a linear transformation.
(b) Find a basis for the kernel ker(D) of the linear transformation D and compute its
nullity.
(c) Find a basis for the image im(D) of the linear transformation D and compute its
rank.
(d) Verify that the Rank-Nullity Theorem holds for the linear transformation D.
(e) Find the matrix representation of D in the standard basis (1,t, t2) of P2.
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