Matrix

A

Angela123

Junior Member
Joined
Oct 9, 2008
Messages
54
A certain 3x3 matrix has as its inverse:
A^-1=[0 -1 1
1 5 4
1 2 -2]

If A[x
y
z]
= [1
0
2], then what is the value of x?
 
You seem to be posting that at quite a few sites....unclearly in all cases...
Can you post it CLEARLY...if you don'y know how, ask someone who does...
 
How is it not clear? I copied it straight from the book. It's not homework or anything, but I'm reviewing for my final so I need help.
 
Angela123 said:
A certain 3x3 matrix has as its inverse:
Code: 
A^-1=[0 -1  1
          1  5  4
          1  2 -2]

If  A[x   
       y
       z]     
= [1
   0
   2], then what is the value of x?
Click to expand...

In matrix algebra - when you multiply [A ]by [A][sup:s53i1d1n]-1[/sup:s53i1d1n] - what do you get?

You'll need to use that knowledge here.

Please show us your work, indicating exactly where you are stuck - so that we know where to begin to help you.
 
Well, there is really no work to show, because I have no idea how to attempt it. Could you give me a hint in the right direction?
 
I did - above. To repeat:

In matrix algebra - when you multiply [A] by [A][sup:3cvvg5b6]-1[/sup:3cvvg5b6] - what do you get?

You'll need to use that knowledge here.
 
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