YAMT: Help this is Basic Algebra

[VTboy]

Ok so b is in the C(A) if and only if Ax=b is consistant.

So this my question does the C(A) exsist if Ax=b is inconsistant. If it does how will I find it.

 

[VTboy]

A simple algebra question

 

[dighn]

what's C()?

 

[VTboy]

C(A)= Column Space of A

 

[VTboy]

Sorry for the bump but I need to know.

 

[bonkers325]

what is C(A) - formula?

 

[VTboy]

C(A) is not a formula it is a span. C(A) is the span of the column space of A.

This is a simple algebra problem.

 

[Dufman]

Originally posted by: VTboy
C(A) is not a formula it is a span. C(A) is the span of the column space of A.

This is a simple algebra problem.

if it is so simple, why not answer it yourself

 

[VTboy]

Originally posted by: Dufman

Originally posted by: VTboy
C(A) is not a formula it is a span. C(A) is the span of the column space of A.

This is a simple algebra problem.

if it is so simple, why not answer it yourself

It has simple answer. But I don't know it. I see you guys helping other people with basic alegbra, but when I ask a simple algebra question no one can help me. Does C(A) exist if the Ax=b is inconsistant.

 

[silverpig]

The key is the "if and only if" part. Basically it's saying condition A is satisfied if condition B is, and isn't satisfied if condition B isn't.

edit: just re-read your initial post... I'm not sure what it's saying anymore. Does the column space of A exist? I dunno. Does A exist? If it does, then it has a column space. Or are you asking if b is in the column space of A?

 

[Dufman]

Originally posted by: VTboy

Originally posted by: Dufman

Originally posted by: VTboy
C(A) is not a formula it is a span. C(A) is the span of the column space of A.

This is a simple algebra problem.

if it is so simple, why not answer it yourself

It has simple answer. But I don't know it.

me either. so i neffed

 

[VTboy]

I should also point out that A is a matrix.

 

[MAME]

Originally posted by: VTboy
Does C(A) exist if the Ax=b is inconsistant.

yes, of course it does

 

[VTboy]

MAME how would I find the C(A) if A if Ax=b is inconsistant. Would it just be the span of the columns of A.

 

[VTboy]

Sorry but I want to know. I am sure someone knows the answer. Would C(A) just be the span of the columns of A if Ax=b is inconsistant.

 

[Tweak155]

Originally posted by: VTboy
A simple algebra question

Actually this is matrix algebra...its a 200 level college course so i wouldnt call it "basic" or "simple"

From the sounds of your question, C(A) doesnt exist because it doesnt have a value at every point. You cant just put a question mark in a spot where you need a value...

 

[Tweak155]

Originally posted by: VTboy
A simple algebra question

Actually this is matrix algebra...its a 200 level college course so i wouldnt call it "basic" or "simple"

From the sounds of your question, C(A) doesnt exist because it doesnt have a value at every point. You cant just put a question mark in a spot where you need a value...

 

[helpme]

Linear algebra. Boo.

 

[Goosemaster]

I'd TRY to help, but you suck at asking a questions...

Instead of periodically giving us "hints" as to what the problem is, give us the ENTIRE PROBLEM AS IT IS WRITTEN, and then we'll talk

Originally posted by: VTboy
I should also point out that A is a matrix.

lo l

 

[tikwanleap]

Originally posted by: Goosemaster
I'd TRY to help, but you suck at asking a questions...

Instead of periodically giving us "hints" as to what the problem is, give us the ENTIRE PROBLEM AS IT IS WRITTEN, and then we'll talk

Originally posted by: VTboy
I should also point out that A is a matrix.

lo l

Agreed, the whole problem please. Some of us are smart, but we're not mind readers.

 

[helpme]

He's just trolling us along...