(a) Use Gauss-Jordan elimination to solve the following system of linear equations. Express your answer in terms of k, where k is any integer.
圖片參考:http://i204.photobucket.com/albums/bb175/EddieOR/math120902.png
(b) Find the value of a if
圖片參考:http://i204.photobucket.com/albums/bb175/EddieOR/math120903.png
Answer:
圖片參考:http://i204.photobucket.com/albums/bb175/EddieOR/math120904.png