A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
Solve the matrix equation for A?
anonymous
 4 years ago
Solve the matrix equation for A?

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327007851191:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Oh yay my friends are here

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.2you need the inverse of the matrix on the left, do you know how to find that?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I know how to do that but they want me to do a simpler method

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.2...like what? maybe it would help if I could actually see the matrix on the right. try to use the equation feature to type it, you can make 2X2 matrices with it.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327008078673:dw

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.2is the right side the identity matrix?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ya but we didnt really learn that yet. We only learnt multiplying and addition and subtraction

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.2I can't see the matrix on the RHS is my problem what is it, the identity matrix?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Like maybe a is a 2 by 2 matrix

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ohhh i see it okk i will redraw it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327008221822:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1since BA=I wouldnt A=B^1 I ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I know but we didnt really use inverse matrices yet But if i cant solve it any other way i will do it that way

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.2...so that is the identity matrix so we could solve this by multiplying out our matrix A with the one on the LHS and get a system of equations:\[2a_{11}a_{21}=1\]\[3a_{11}2a_{21}=0\]\[2a_{12}a_{22}=0\]\[3a_{12}2a_{22}=1\]

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1\[\begin{pmatrix}a&b\\c&d\end{pmatrix}^{1}=\frac{1}{det}\begin{pmatrix}d&b\\c&a\end{pmatrix}\]

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.2I only did it this way amistre because they said not to use the inverse... but yes, the inverse seems the smarter/easier way to do it.

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1youre way is fine, I just did that for the practice really :)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1also, i think the GaussJordan comes up with an inverse as well

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Ya it does :D Thanks guys
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.