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The problem is... "If the entries in each row of an nxn matrix, A, add up to zero prove that the determinant of A is zero. (Hint: Consider the product AX where X is the nx1 matrix, each of whose entries is one.)"
Any help would be appreciated.
Oh haha the rest of it wasn't up yet, now it makes sense, thanks so much!
I understand everything you did, but I am still confused on how bg-cf=1 can disprove this.
The question for my matrix algebra class is: show that there is no 2x2 matrix A and B such that AB-BA= I2 (I sub 2, identity matrix, sorry can't write I sub2)
I2: |1 0|
|0 1|
We obviously can't prove it with a specific example, it has to work for all 2x2 matrices. anyone know how to prove this? Thanks for the help!
Sorry, to clerify the coin is flipped first, then the die rolled
What is the chance of getting a tail on a coin before getting a 1 on a die? I was trying it and I think it involves a limit, I am just not sure how to set it up. Thanks in advance!
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