If A and B are both square matrices of the same size and tr(A)=tr(B) then A = B. If A is an invertible matrix then AT is also invertible. If A,B,C are all square matrices of the same size such that AB = AC then B = C Suppose A is a 6x6 square matrix with det(A) = 3. Then det(2AT) = = 192 Suppose A is 3x2 matrix and the system Ax = 0 has a unique solution. Then the system = b has a unique solution for any b. Ax If A is a skew symmetric matrix then A is not invertible. Suppose A is a square matrix such that A³ = I. Then A is invertible.

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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can someone please do the last 4? ( starting from the suppose A is a 6x6)
show all work with explanations please 

If A and B are both square matrices of the same size and tr(A)=tr(B) then A = B.
If A is an invertible matrix then AT is also invertible.
If A,B,C are all square matrices of the same size such that AB
AC then B = C
Suppose A is a 6x6 square matrix with det(A) = 3. Then det(2AT) = 192
0 has a unique solution. Then the system
Suppose A is 3x2 matrix and the system Ax
b has a unique solution for any b.
Ax
If A is a skew symmetric matrix then A is not invertible.
Suppose A is a square matrix such that A3
I. Then A is invertible.
Transcribed Image Text:If A and B are both square matrices of the same size and tr(A)=tr(B) then A = B. If A is an invertible matrix then AT is also invertible. If A,B,C are all square matrices of the same size such that AB AC then B = C Suppose A is a 6x6 square matrix with det(A) = 3. Then det(2AT) = 192 0 has a unique solution. Then the system Suppose A is 3x2 matrix and the system Ax b has a unique solution for any b. Ax If A is a skew symmetric matrix then A is not invertible. Suppose A is a square matrix such that A3 I. Then A is invertible.
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