SOLUTION: Hai sir, Pls help on this problem "An idempotent matrix A where a) A2 = A b) A2 = I c) A2 = -A d) A2 = 0

Algebra ->  Matrices-and-determiminant -> SOLUTION: Hai sir, Pls help on this problem "An idempotent matrix A where a) A2 = A b) A2 = I c) A2 = -A d) A2 = 0      Log On


   

Question 397771: Hai sir,
Pls help on this problem
"An idempotent matrix A where
a) A2 = A
b) A2 = I
c) A2 = -A
d) A2 = 0
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The definition of an idempotent matrix A is A%5E2+=+A, so the answer is a.