Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Anyone want to help me get started? I am pretty sure I can do the rest on my own.
 one year ago

Cecily Group TitleBest ResponseYou've already chosen the best response.0
Represent the system in matrix form
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Yep, that's what I did.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
How do I go on from there?
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
@zepdrix @Outkast3r09
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
take the determinant of the coefficient matrix, and set it equal to zero.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Woah woah!!! We haven't learned what a determinant is yet. :P .
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
okay. how about gaussjordan reduction?
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Yeah. We learned that.
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
i got something easier than gaussjordan. multiply equation 2 by (1), and equation 3 by 2, then add the two equations.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Elimination?
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
3y3z=a+2 ?
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
not 3y+3z = a + 2 ?
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Yeah. My mistake.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Allright, what next?
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
use that equation with equation 1 to eliminate both y and z.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
THat dosen't eliminate it. It makes it bigger.
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
bx + 3y + 3z = a 3y + 3z = 2  a subtract.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
I used substitution instead. Should till be valid right?
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
or if you wish to substitute...
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
that's valid too.
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
bx + (2a) =a bx = 2a  2
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
dw:1358650895030:dw
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
you're not to eliminate a, but y and z.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Lets us elimination then lol.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Now would I solve for a and substitute this into equation 2?
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
now if you put b = 1, and a any real number other than 1, say 3, 0x = 4 0 = 4 which is clearly false.
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
err. i mean put b = 0.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Why can I put 1?
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Ohh never mind. I see why.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
For infinitely many solutions I would make 0=0 right?
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
right about that.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Okay what about a unique solution? @sirm3d
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
unique solution when b is not equal to zero.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
and a is 1 right?
 one year ago

sirm3d Group TitleBest ResponseYou've already chosen the best response.1
any value of a for as long as b not zero will yield a unique solution
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Thanks so much!
 one year ago
See more questions >>>
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.