1. a) Let x is n-vector and pand q are two constant n-vector. f(x) = ßx – q² - |l8x – q1? is f(x) linear, or affine or neither? Justify your answer. Show all calculations clearly. b) Here's a system...

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Extracted text: 1. a) Let x is n-vector and pand q are two constant n-vector. f(x) = ßx – q² - |l8x – q1? is f(x) linear, or affine or neither? Justify your answer. Show all calculations clearly. b) Here's a system of 512 linear equations in 512 variables x, X3. .. X512: 513 X2 + X3 + + X311 + X512i %3D 514 X1 + X3 + + X311 + X5125 1023 X1 + X2 + + X510 + X512i X1 + X2 + + X310 + X511- 1024 = Does it have a unique solution? 2. Consider the following matrix A a. Perform LU factorization. i.e Find L and U so that PA = LU. You must calculate permutation matrices- (if needed) and elementary matrices to find Land U. 0 1 3 5 1 3. Let x = (2 531), a = (4 231) be two vectors in R“. Find a matrix A where y = Ax and x is the projection of x over a. 4. Set up and solve a linear system to find vector x in R° that are simultaneously perpendicular to the vector (2,1,1)" and (2,1,3)". Can you explain and show it geometrically? 2.