A community for students.
Here's the question you clicked on:
 0 viewing
chrisplusian
 one year ago
Linear algebra... Please see attachments
chrisplusian
 one year ago
Linear algebra... Please see attachments

This Question is Closed

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0I am pretty sure these answers are correct. My question...

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0Is there a better way to approach the problem? In my linear algebra class so far we have studied: Matirx algebra,Matrix inverse, powers of matrix,transpose of matrix, vectors in R^n

steve816
 one year ago
Best ResponseYou've already chosen the best response.0Wow, you're super neat! Sorry I can't help you because I haven't learned about matrices yet... but what class do you learn matrices in?

steve816
 one year ago
Best ResponseYou've already chosen the best response.0nvm, so you take linear algebra.

thomas5267
 one year ago
Best ResponseYou've already chosen the best response.2Nope! The answer is wrong. I feel sad for you.

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1There are many ways to do this problem and the method you took will work but sort of defeats the purpose of linear algebra. I would find the inverse of the 2x2 matrix and multiply both sides, on the left, by that.

thomas5267
 one year ago
Best ResponseYou've already chosen the best response.2The first question is right. The second is not.

thomas5267
 one year ago
Best ResponseYou've already chosen the best response.2The 2x2 matrix in the second question is invertible so you are good to go.

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0Honestly this class is really hard for me, the way the professor teaches is by reading the proofs (verbatim) from the book, and then displaying a look that shows he has somehow managed to manifest some secret meaning. The problem is that only he gets it. Our book is a publication from overseas so I can't find a solution guide to check what I am doing, so I am kind of looking here for help

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0I really don't know what I should have seen that would clue me in on what approach to take working on this problem

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0any advice is greatly appreciated

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0@zzr0ck3r could you illustrate what you mean?

thomas5267
 one year ago
Best ResponseYou've already chosen the best response.2\[ \mathbf{A}=\begin{pmatrix}2&1\\5&3\end{pmatrix}\\ \mathbf{A}^{1}\text{ exists.}\\ \mathbf{AY}=\begin{pmatrix}1&0&1&0\\5&0&2&4\end{pmatrix}\\ \mathbf{A}^{1}\mathbf{AY}=\mathbf{A}^{1}\begin{pmatrix}1&0&1&0\\5&0&2&4\end{pmatrix}\\ \mathbf{Y}=\mathbf{A}^{1}\begin{pmatrix}1&0&1&0\\5&0&2&4\end{pmatrix}\\ \]

chrisplusian
 one year ago
Best ResponseYou've already chosen the best response.0So what I should have done is generically named the two given matrices, used property of matrices to solve for Y and then do the given operations to find Y?

thomas5267
 one year ago
Best ResponseYou've already chosen the best response.2Not exactly. I named \(\mathbf{A}=\begin{pmatrix}2&1\\5&3\end{pmatrix}\) because I find \(\begin{pmatrix}2&1\\5&3\end{pmatrix}^{1}\) ugly. Since \(\begin{pmatrix}2&1\\5&3\end{pmatrix}^{1}\) exists, we could do what I wrote above. Not all matrix has an inverse. For example, \(\begin{pmatrix}1&0\\0&0\end{pmatrix}\) does not have an inverse.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.