- #1
kolley
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Homework Statement
A is an mxn matrix and C is a 1xm matrix. Prove that CA=Sum of (C sub j)*(A sub j) from j=1 to m.
Where A sub j is the jth row of A
Sorry for the messy problem statement, I couldn't figure out the summation notation on here.
Homework Equations
The Attempt at a Solution
I set (C sub j)*(A sub j)=D sub j
I then tried to manipulate it towards something, but I made no progress, thanks for any help you can give.