|Mar24-09, 03:55 PM||#1|
some linear algebra problems i need help with
Let A and B be nxn matrices.
1. Suppose that AB=AC and det A does not equal 0. Show that B=C
2. Show that A is nonsingular if and only if A transpose is nonsingular.
3. Show that det AB = det BA.
4. Show that det AB = 0 if and only if det A=0 or det B=0
5. Show that if AB= -BA and n is odd, then A or B is singular.
6. Show that det A*Atranspose is greater than equal to 0
7. Show that det A*Btranspose = det Atranspose* det B
8. Let A be nxn skew-symmetric matrix. If n is odd, show that det A=0
9. Show that 3x3 vandermonde matrix has a determinant equal to (a-b)(b-c)(c-a) The matrix is
[1 1 1
a b c
a^2 b^2 c^2]
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
|Mar24-09, 03:59 PM||#2|
No one is going to give you the answer without any work. Do your own homework and ask for help here if you need it
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