Question 2 (a) Use a Givens reflection to transform the system to upper triangular form and then solve the upper triangular system. 2x1 +2 -213 71 -12 +373, b = 2x2 -73 [1] 2

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Question 2
(a) Use a Givens reflection to transform the system to upper triangular form
and then solve the upper triangular system.
(b) Given
2x1
21
A =
1
4
+2 -2x3
<-72
2x2
+3x3, b =
-73
1
4 -1
3 5
-1 0 2
1
2
-1
and b =
-[4]
(i) Use the Householder transformation to transform A into an upper
triangular matrix R.
(ii) Apply the same transformation from part (i) to b, that is, comput
b¹)= H₂H₁b
(iii) Solve Rx = b(¹) for x and check your answer by computing the
(
residual r= b - Ax'.
A
Transcribed Image Text:Question 2 (a) Use a Givens reflection to transform the system to upper triangular form and then solve the upper triangular system. (b) Given 2x1 21 A = 1 4 +2 -2x3 <-72 2x2 +3x3, b = -73 1 4 -1 3 5 -1 0 2 1 2 -1 and b = -[4] (i) Use the Householder transformation to transform A into an upper triangular matrix R. (ii) Apply the same transformation from part (i) to b, that is, comput b¹)= H₂H₁b (iii) Solve Rx = b(¹) for x and check your answer by computing the ( residual r= b - Ax'. A
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