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

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

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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) (Show Source): You can put this solution on YOUR website!
The definition of an idempotent matrix A is , so the answer is a.
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