a) Let U be an m xn matrix with orthonormal columns, and x and y be in R". Then i. | Ux l=1 x| (Ux) · (Uy) = x•y iii. (Ux) · (Uy) = 0 if and only if x y = 0. b) Let A =* Explain why A* approaches o -5...

Extracted text: a) Let U be an m xn matrix with orthonormal columns, and x and y be in R". Then i. | Ux l=1 x| (Ux) · (Uy) = x•y iii. (Ux) · (Uy) = 0 if and only if x y = 0. b) Let A =* Explain why A* approaches o -5 -751 as k - 00. L4 1.2 1.50 Answer: