ch9. problem4

316 days ago by ghkdgnf

x1=vector([12,-12,43]) x2=vector([0,12,-3]) x3=vector([12,-12,5]) x4=vector([-2,3,1]) X=matrix([x1,x2,x3,x4]) print X.rank() 
       
3
3
A=matrix(4,4,[1,1,3,0,2,-5,-1,0,3,-4,2,0,1,0,2,0]) print A.rref() 
       
[1 0 2 0]
[0 1 1 0]
[0 0 0 0]
[0 0 0 0]
[1 0 2 0]
[0 1 1 0]
[0 0 0 0]
[0 0 0 0]
p1=x^(3)+4*x^-2*x+3 p2=x^(3)+6*x^(2)-x+4 p3=3*x^(3)+8*x^(2)-8*x+7 wronskian(p1,p2,p3) 
       
0
0