A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
why we ignore the last row of augmented matrix if it consists entirely of zeros?
anonymous
 4 years ago
why we ignore the last row of augmented matrix if it consists entirely of zeros?

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327674600709:dw isnt the last row be 0x+0y+0z=0 and have infinitely many solutions.

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0who says we ignore it?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0the last row tells us the when 0=0 we have that many solutions; well, 0 always = 0 so there are infinitely many solution

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0it also tells us that the last row doesnt add any new information to the system. deleting that row would still give us the right answers

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.01x+3y = 5 2x + y = 7 4x 2y = 14 for example since eq3 is just a multiple of eq2 then it doesnt give us any new information to help solve the system does it?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0in other words we can say that the solution of 1st two equations will also satisfy the 3rd equ but any solution of 3rd equ will never satisfy the 1st two equations so we ignore the 3rd row right?
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.