Hank asked 11 months ago

P.56 #1
The reduced echelon form I get is:
0  0  3  2
0  0 -3  2
0  0  0  0
0  0  0  0
This is inconsistent system, right? Do we still discuss its r?
Is n=1 or 3?
if n=3, are X1&X2 free variables?


Yu Staff replied 11 months ago

What’s p.56 #1?
I don’t know which problem it is, but the matrix you gave is not in reduced row echelon form.

Hank replied 11 months ago

Sorry, it’s P.37 #1
0  0  3  0
0  0  0 1
0  0  0  0
0  0  0  0

Yu Staff replied 11 months ago

There are solutions at the end of the textbook for odd number problems. According to the solution, the matrix you gave is not correct.