# (new book)Ch-3-exam-11-New-황성빈

## 2126 days ago by matrix

A=matrix(4,5,[2,-2,-4,-2,2,2,-1,-3,-3,2,-2,2,5,1,-3,2,-2,-4,-1,5]) b=vector([2,3,-1,2]) print A.augment(b).rref(A)
 [1 0 0 0 9 3] [0 1 0 0 1 0] [0 0 1 0 2 1] [0 0 0 1 3 0] [1 0 0 0 9 3] [0 1 0 0 1 0] [0 0 1 0 2 1] [0 0 0 1 3 0]
A=matrix(4,5,[4,0,1,1,10,2,4,1,6,1,2,4,2,4,1,2,-4,-1,0,5]) print A.rref()
 [ 1 0 0 0 7/2] [ 0 1 0 0 7/6] [ 0 0 1 0 -8/3] [ 0 0 0 1 -4/3] [ 1 0 0 0 7/2] [ 0 1 0 0 7/6] [ 0 0 1 0 -8/3] [ 0 0 0 1 -4/3]