2x 7.18. Let the function T : P₂ → P3 be defined by T (p(x)) = fx*p(t) dt. Show that T is a linear transformation. Find the matrix of T relative to the standard bases of P2 and P3. 7.19. Let B = {1, 1+x, 1+x+x²} and let f(x) = 4x²+x+3. Show that B is a basis for P2 and find the coordinate vector [f(x)]B of f(x) relative to the basis B.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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I would greatly appreciate your guidance in utilizing matrix notation exclusively to solve this problem. I'm currently facing difficulties and need assistance without relying on other methods. Could you kindly provide a step-by-step explanation, using only matrix notation, to help me reach the solution?

Additionally, I have included the question and answer for both of the problems for reference. Could you please demonstrate the matrix-based approach leading to the solution?

7.18
ГО
1
0
7.19 Let
OOMINO
0
0
0
OOONM
C₁ (1) + C₂ (1+x) + C3 (1+x+x²) = 0,
C₁ + C₂ + C3 + (C₂+ C3)x+ C3x² = 0,
for all x. Since 1, x, x² are linearly independent, hence
for all x. Then
C₁ + C₂ + C3 = 0, C₂ + C3 = 0, C3 = 0 ⇒ C₁ C₂ C3 = 0.
This proves the linear independence of the three vectors 1,1 + x, 1 + x + x².
Since dim(P₂) = 3, hence the set B = {1,1 + x, 1 + x + x²} is a basis for P₂. To
find the coordinate vector [f(x)]B, write f(x) as a linear combination of the
basis vectors. Write
4x² + x + 3
Hence [f(x)]B =
a(1) + b(1+x) + c(1+x+x²)
⇒a+b+c= 3, b + c = 1, c = 4 ⇒a= 2, b = -3, c = 4.
I
=
2
4
-3
4
Transcribed Image Text:7.18 ГО 1 0 7.19 Let OOMINO 0 0 0 OOONM C₁ (1) + C₂ (1+x) + C3 (1+x+x²) = 0, C₁ + C₂ + C3 + (C₂+ C3)x+ C3x² = 0, for all x. Since 1, x, x² are linearly independent, hence for all x. Then C₁ + C₂ + C3 = 0, C₂ + C3 = 0, C3 = 0 ⇒ C₁ C₂ C3 = 0. This proves the linear independence of the three vectors 1,1 + x, 1 + x + x². Since dim(P₂) = 3, hence the set B = {1,1 + x, 1 + x + x²} is a basis for P₂. To find the coordinate vector [f(x)]B, write f(x) as a linear combination of the basis vectors. Write 4x² + x + 3 Hence [f(x)]B = a(1) + b(1+x) + c(1+x+x²) ⇒a+b+c= 3, b + c = 1, c = 4 ⇒a= 2, b = -3, c = 4. I = 2 4 -3 4
2x
7.18. Let the function T: P₂ → P3 be defined by T (p(x)) = ²x p(t) dt. Show
that T is a linear transformation. Find the matrix of T relative to the standard
bases of P₂ and P3.
7.19. Let B = {1, 1+x,1+x+x2) and let f(x) = 4x²+x+3. Show that B is a
basis for P₂ and find the coordinate vector [f(x)]B of f(x) relative to the basis
B.
Transcribed Image Text:2x 7.18. Let the function T: P₂ → P3 be defined by T (p(x)) = ²x p(t) dt. Show that T is a linear transformation. Find the matrix of T relative to the standard bases of P₂ and P3. 7.19. Let B = {1, 1+x,1+x+x2) and let f(x) = 4x²+x+3. Show that B is a basis for P₂ and find the coordinate vector [f(x)]B of f(x) relative to the basis B.
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