- #1

## Homework Statement

(i) Reduce the system to echelon form C|d

(ii) For k = -12, what are the ranks of C and C|d? Find the solution in vector form if the system is consistent.

(iii) Repeat part (b) above for k = −18

## Homework Equations

Gaussian elimination I used here:

http://mathworld.wolfram.com/GaussianElimination.html

## The Attempt at a Solution

I've attempted reducing the matrix but have run into this problem where I have two zeroes leading in the last three rows. I don't know what I am doing wrong, so any help would be greatly appreciated.

I can't continue with either parts b or c without solving part a, and I'm not too sure about those parts either.