Question

Matrix
10

Answer 1

http://prntscr.com/4bqex7

Answer 2

@mathmale

Answer 3

10) b)

Answer 4

@ganeshie8

Answer 5

You want to find the inverse of matrix 10b? Have you done matrix inverses before? If so, using which method or methods?

Answer 6

i think gauss jordan method will be helpful

Answer 7

I think so too. Eric, what's the first thing you'd do to matrix 10b to prepare yourself to find its inverse?

Answer 8

if A is reduced to I by elementary transformation then \[PA=I\]
where
\[P=P_nP_{n-1}...P_2P_1\]
then
\[P=A^{-1}\]

Answer 9

Usually, I use this method
http://prntscr.com/4bqi41

Answer 10

Nw, I'm required to use elementary row of operation for this question

Answer 11

Have you used elem. row ops on easier matrices?

Answer 12

Nope

Answer 13

I've never use this method before

Answer 14

Then it'd be a big jump from where you are now to finding the inverse of a 3x3 matrix.
Have you heard of the "Gauss-Jordan" method? It involves "elementary row operations"

Answer 15

No

Answer 16

We'll have to decide what we together should do at this point. I can teach you how to do any or all of the work involved, but we'd be starting from scratch, and the process would take quite some time. Have you a reference book that deals with the "Gauss-Jordan" method?

Answer 17

no

Answer 18

Learning this method would come first; finding the inverse of matrix 10b would follow. So I assure you I'm not taking you off topic.

Eric, suggest you do Internet searches for pertinent info and examples when faced with a situation like this one. I performed my own Internet search for "Gauss-Jordan elimination method" and came up with quite a lot of info:

https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1CHFX_enUS461US461&ion=1&espv=2&es_th=1&ie=UTF-8#q=gauss-jordan%20elimination%20method

I'd suggest you focus on the first reference:

www.purplemath.com/modules/systlin6.htm

Answer 19

ok

Answer 20

Rather than give you a lengthy explanation, I'm going to lead you thru the solution of an easy actual problem. Suppose you were given

Answer 21

Thank you

Answer 22

(This is a matrix equation)
...and that you are asked to find the values of x and y that satisfy this system of linear equations. I'll go further into that too, as necessary.