Question

Help with Matrices question

Answer 1

fun ok so you take the first and add an identity matrix after
and do a reduced echelon form so you get [A I ] togeather

so like this

1 1.4 1 1 0 0
1.2 0 0.8 0 1 0
-1.6 0.2 -1 0 0 1

Answer 2

You add that to the first Matrix?

Answer 3

if you can multiply the two matricies together and get the identity matrix, then they are inverses of each other ^_^

Answer 4

ya

Answer 5

Lol Its the matrix master

Answer 6

\[A^{-1} A = I\]

Answer 7

\(\begin{matrix}
&A&A^{-1}&\\
&\begin{bmatrix}
a&b&c\\
d&e&f\\
g&h&i
\end{bmatrix}\times
&\begin{bmatrix}
j&k&l\\
m&n&o\\
p&q&r
\end{bmatrix}\implies
&\begin{bmatrix}
1&0&0\\
0&1&0\\
0&0&1
\end{bmatrix}
\end{matrix}
\)

Answer 8

your PRODUCT matrix will have to look EXACTLY like that, with zeros and ones going down diagonally

Answer 9

@jdoe0001 probABLY a lot clearer that way than what I was trying to say, lol

Answer 10

if they're inverse of each other

Answer 11

So i am still confused what do you multiply together like the 1st matrix by the other

Answer 12

http://www.youtube.com/watch?v=sYlOjyPyX3g

Answer 13

yes, you multiply them... to get the so-called "identity matrix" the ones with the zeros and ones

Answer 14

if you get the identity matrix, they're inverse of each other, if not, then not

Answer 15

so for the first row i got 3 5 2

Answer 16

second row I got -1.92 0 -.8

Answer 17

so the top left corner of the procuct of the two matrixes will