SOLUTION: 1.Find the inverse of the matrix if it exists. A= [1,-2,0] [1,3,0] [0,0,1] 2.Find the inverse of the matrix if it exists. A= [3,-1,0] [4,1,0] [0,0,4]

Algebra ->  Matrices-and-determiminant -> SOLUTION: 1.Find the inverse of the matrix if it exists. A= [1,-2,0] [1,3,0] [0,0,1] 2.Find the inverse of the matrix if it exists. A= [3,-1,0] [4,1,0] [0,0,4]      Log On


   

Question 629138: 1.Find the inverse of the matrix if it exists.
A=
[1,-2,0]
[1,3,0]
[0,0,1]
2.Find the inverse of the matrix if it exists.
A=
[3,-1,0]
[4,1,0]
[0,0,4]
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 A= =%28matrix%283%2C3%2C1%2C-2%2C0%2C1%2C3%2C0%2C0%2C0%2C1%29%29

 D =  = 5

 I = 1/5

 I = 1/5%28matrix%283%2C3%2C3%2C2%2C0%2C-1%2C1%2C0%2C0%2C0%2C5%29%29

 I = %28matrix%283%2C3%2C3%2F5%2C2%2F5%2C0%2C-1%2F5%2C1%2F5%2C0%2C0%2C0%2C1%29%29