Is is possible to multiply the matrix M with either A or c?

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The discussion centers on the multiplication of matrix M with matrix A or vector c, specifically addressing the conditions under which these operations are valid. It is confirmed that matrix A (3x3) and vector c (3x1) can be multiplied, but division is not applicable in this context. The conversation highlights the necessity of using the inverse of matrix A (denoted as A-1) for multiplication, provided that A is non-singular. Additionally, the importance of determinants in determining the invertibility of matrix A is emphasized.

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Matrices
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(mxn) x (nxk)
is is possible to multiply the matrix M with either A or c->?

1604056880932.png

And if i have to write the matrices in this form:
1604057047363.png
, do i divide c-> by A or do i follow som other formula?
 
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What are the dimensions of ##A## of and ##\vec{c}##?
 
3x3 and 3x1, they can be multiplied
 
conv said:
3x3 and 3x1, they can be multiplied

Yes, so what's your question? Can you please clarify?
 
How can i find vector x :

1604059214015.png

Do i have to multiply A with c ? Because its not possible to divide them?
 
You have to matrix multiply by the left by ##A^{-1}##, assuming that ##A## is non-singular.
 
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For what values of ##s## is ##A## an invertible matrix? (Possible hint: Determinants).
 
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