A square matrix A is said to be idempotent if . (a) Show that if A is idempotent, then
Chapter 1, Problem 54(choose chapter or problem)
A square matrix A is said to be idempotent if . (a) Show that if A is idempotent, then so is . (b) Show that if A is idempotent, then is invertible and is its own inverse.
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