I have a question about an old exam and i have no idea where to start. The question says:
Find the vector in the row space A=[1 0 1 1 /new row 0 1 -1 1] 2x4 matrix nearest to the vector (1,1,-1,1)
I have absolutely no clue how to start.
The Attempt at a Solution
I have no clue how to start this...
my attempt was looking at it being confused for an hour