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**Unformatted text preview: **Cofactors Concept Questions 1. Explain the dierence between orthogonal matrices and orthonormal matrices. 2. Explain the dierence between orthogonal and orthonormal vectors. 3. How many basis vectors are needed to describe the subspace of R 4 dened by x-y = 0? 4. ( T / F ) If the columns of a matrix A are linearly independent, then so will be the columns after applying the Gram-Schmidt process. 5. ( T / F ) If A is orthonormal, A ( A T A )-1 A T = AA T . 6. ( T / F ) If the columns of A are orthonormal, then the rows of A are orthogonal. 1 TA: Kyle Wilson...

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