given the matrix A, what is A^-1

A= [ 0 15]
[ 0 1 ]

Question

given the matrix A, what is A^-1

A= [ 0  15]
      [ 0   1 ]

anonymous · Answer

@Hero

anonymous · Answer

@zepdrix

anonymous · Answer

All that it is asking you to do is 0^-1, 15^-1, 0^-1, and 1^-1

anonymous · Answer

Once you have the answer, put them in a new matrix with the answer in the corresponding corner of the question. So the answer to 0^-1 would be in the top right and so on.

hero · Answer

@Novalynne, Finding the inverse of a matrix doesn't work that way

hero · Answer

$$A^{-1} = \frac{1}{|A|} \begin{bmatrix}  d & -b \ -c & a \end{bmatrix}$$

anonymous · Answer

would it be [0   0]
                  [0   0]

phi · Answer

a matrix that has a row  or column of all zeros will not have an inverse.  
You will notice a problem when you try to find the determinant (you get 0) and 1/0 is undefined.

anonymous · Answer

okay thanks @phi so would it be [0   -15]
                                                   [ 0    -1]

phi · Answer

a matrix that has a row  or column of all zeros will not have an inverse.

anonymous · Answer

ohhh sorry i messed up, so one of the answers is does not exist would that be correct

anonymous · Answer

@phi

phi · Answer

Yes, there are a number of ways to say the something:
does not exist
does not have 
cannot be found...

anonymous · Answer

alright thanks for the help!!