anonymous
  • anonymous
Find the inverse of the following matrix A, if possible. Check that... WILL GIVE A MEDAL :)
Mathematics
chestercat
  • chestercat
See more answers at brainly.com
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your free account and access expert answers to this
and thousands of other questions

inkyvoyd
  • inkyvoyd
The question is, will you give your calculator a medal if you did the same thing? ;)
inkyvoyd
  • inkyvoyd
If you own a graphing calculator, chances are you will be able to use it to do this math problem. I'm assuming that this is NOT homework OR testwork. If it is, I'll try to work you through the problem.
anonymous
  • anonymous
|dw:1363038798101:dw|

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
sorry we are not suppose to use a graphing calculator actually.
anonymous
  • anonymous
inkyvoyd
  • inkyvoyd
In this case, you might have to give us the matrix A in order to start...
anonymous
  • anonymous
how?
anonymous
  • anonymous
can u show me the steps on finding this solution? please i dont understand what i did wrong
inkyvoyd
  • inkyvoyd
Well, you might want to type the A matrix because I can't find the inverse of the matrix without the matrix itself xD
RadEn
  • RadEn
|dw:1363039261135:dw|
inkyvoyd
  • inkyvoyd
Also, please tell me the name of the unit/course you are taking at the moment. There are a number of ways to find the inverse of a matrix. I'm assuming you are using determinants or Gauss-Jordan elimination, but if you are using something else please let me know.
anonymous
  • anonymous
section 4.5 The Gauss Jordan method for calculating Inverses.
inkyvoyd
  • inkyvoyd
Okay. Please tell me what matrix A is. I mean, the four numbers...
RadEn
  • RadEn
lol, @Anita505 can u draw ur matrix according in ur book :)
anonymous
  • anonymous
oh yes haha sorry about that. :p
anonymous
  • anonymous
|dw:1363039743929:dw|
inkyvoyd
  • inkyvoyd
Begin with your matrix and the identity matrix. Now, you want to make the left hand side the identity matrix, and the right hand side will be the inverse. Use elementary row operations. 6 5|1 0 2 7|0 1 Let's multiply the second row by 3, so that first number is also 6 6 5 |1 0 6 21|0 3 Now subtract the first row from the second row REMEMBER: We want the left hand side to be the identity matrix! 6 5 |1 0 0 16|-1 3 The zero in the bottom left is a start - we want to keep going. What do you think we should do next?
anonymous
  • anonymous
we want to get a 1
anonymous
  • anonymous
on the bottom left corner
anonymous
  • anonymous
oops right**
inkyvoyd
  • inkyvoyd
Yes. so we simply divide the that bottom row by 16. 6 5 |1 0 0 1|-1/16 3/16 Next we'll find the top row by subtracting 5 times the second row 6 0|21/16 -15/16 0 1|-1/16 3/16 finally divide row one by 6. I'ma check my work to see if I got it correct xD - tell me what you got xD
anonymous
  • anonymous
@inkyvoyd can you please draw out the matrix solution? this is very confusing.. to understand ahah
inkyvoyd
  • inkyvoyd
I'm afraid I can't do that - what I will do is tell you if what you get agrees with what I get. Is that fair?
anonymous
  • anonymous
okay so what did u get for the first row and first column, first row and second column, and what did u get for the second row first column and second row second column
anonymous
  • anonymous
|dw:1363062987282:dw|
inkyvoyd
  • inkyvoyd
Can you tell me what you got, so I can check your answer? :)
anonymous
  • anonymous
my answer is incorrect tho thats why i asked u to show me what u did :p
inkyvoyd
  • inkyvoyd
Tell me what your answer is :)
anonymous
  • anonymous
1 I -3 0 I 1
inkyvoyd
  • inkyvoyd
6 0|21/16 -15/16 0 1|-1/16 3/16 this is where I left off. This is only one step left - use a single easy elementary operation to make the left hand the identity matrix. and the right hand will be your answer :)
anonymous
  • anonymous
so -15 I 16 3 I 16 is what u got?
inkyvoyd
  • inkyvoyd
No... the correct matrix is 7/32 -5/32 -1/16 3/16
anonymous
  • anonymous
ohh okay they are in fractions oh okay thank you!
inkyvoyd
  • inkyvoyd
yes, my bad http://www.bluebit.gr/matrix-calculator/calculate.aspx
anonymous
  • anonymous
thank you can u help me with a few more questions?

Looking for something else?

Not the answer you are looking for? Search for more explanations.