Find the inverse for the matrix, if it exists.
|1 1 1|
|2 1 1|
|2 2 3|

Question

Find the inverse for the matrix, if it exists.
|1 1  1|
|2 1  1|
|2 2  3|

amistre64 · Answer

put it against the identity matrix and try to convert it into the identity matrix.....

amistre64 · Answer

[1 1 1 | 1 0 0]
[2 1 1 | 0 1 0]
[2 2 3 | 0 0 1]

amistre64 · Answer

the rest of it looks like a mystery lol

anonymous · Answer

for real ? OMG it's my midterm :(

amistre64 · Answer

give me a minute to review this ;)

amistre64 · Answer

[1 1 1 ]    [a b c]   [1 0 0]
[2 1 1 ] * [d e f] = [ 0 1 0]   if anything else
[2 2 3 ]    [g h i]     [0 0 1]

amistre64 · Answer

let me try this;:

[1  0   0]
[2 -1 -1]  let me try that as the inverse...
[-2 0   1]

amistre64 · Answer

......not quite seeing it here..

amistre64 · Answer

the matrix inverter says its:

[-1 1  0]
[4 -1-1]
[-2 0  1]

amistre64 · Answer