Suppose that A is a 3x3 matrix whose determinant is 2. If B is obtained from A by exchanging row 1 with row 3, then det(B) If C' is obtained from A by multiplying the second row by 3, then det(C) = If D = 3A, then det(D)

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter3: Determinants
Section3.1: The Determinants Of A Matrix
Problem 70E: The determinant of a 22 matrix involves two products. The determinant of a 33 matrix involves six...
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Part I
Suppose that A is a 3x3 matrix whose determinant is 2.
If B is obtained from A by exchanging row 1 with row 3, then
det(B) :
If C is obtained from A by multiplying the second row by 3, then
det(C)
If D :
3A, then det (D)
If the first two rows of E are the same as the first two rows of A, but
the third row of E is equals to the sum of the first and third rows of
A, then det (E)
det (A")
det (A¯')
If F is a 3x3 matrix and all three rows of F' are the same, then
det(F) =
If G is obtained from A by subtracting 3 times the first row of A
from the second row of A, and leaving the other rows unchanged,
then det(G) =
If H is a 3x3 triangular matrix whose diagonal entries are 3, -1 and -2,
then det(H)
det(I)
If K is a square matrix that is not invertible, then det(K) =
If L is the lower triangular matrix obtained from an LU
decomposition of A, then det(L)
If M
BC, where B and C are as described above, then
det(M) =
Transcribed Image Text:Part I Suppose that A is a 3x3 matrix whose determinant is 2. If B is obtained from A by exchanging row 1 with row 3, then det(B) : If C is obtained from A by multiplying the second row by 3, then det(C) If D : 3A, then det (D) If the first two rows of E are the same as the first two rows of A, but the third row of E is equals to the sum of the first and third rows of A, then det (E) det (A") det (A¯') If F is a 3x3 matrix and all three rows of F' are the same, then det(F) = If G is obtained from A by subtracting 3 times the first row of A from the second row of A, and leaving the other rows unchanged, then det(G) = If H is a 3x3 triangular matrix whose diagonal entries are 3, -1 and -2, then det(H) det(I) If K is a square matrix that is not invertible, then det(K) = If L is the lower triangular matrix obtained from an LU decomposition of A, then det(L) If M BC, where B and C are as described above, then det(M) =
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