Question: (3 points) Prove that if A is an n by n invertible upper triangular matrix, then the inverse of A is an upper triangular

(3 points) Prove that if A is an n by n invertible upper triangular matrix, then the inverse of A is an upper triangular 

(3 points) Prove that if A is an n by n invertible upper triangular matrix, then the inverse of A is an upper triangular matrix.

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