Question: 3 and 8 on paper please 3. Let A be an invertible matrix such that A-1 Solve the system (242)x = b, where b =

3 and 8 on paper please

3. Let A be an invertible matrix such that A-1 Solve the system (242)x = b, where b = 8. Let x and y be vectors in 3-space, and suppose u is orthogonal to both x and y. Prove that u is also orthogonal to kix + kzy, for every pair of scalars k, and k2

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