Question 1 Let A = Not complete and B = . What is the value of IIA - BIIF ? Points out of 1.00 Answer: Flag question Check Question 2 For any matrix A and vector x, |Ax| |2 can be rewritten as which of the following Not complete expressions. Points out of 1.00 Select one: Flag O a. Vx ATAX question O b. ( Ax, Ax) 2 O c. (Ax, Ax) Check Question 3 Suppose Uj and U2 are orthogonal unit vectors. What is the value of Ilu, + 202 1/?? Not complete Points out of 1.00 Answer: Flag question CheckQuestion 4 Let V be a matrix with k columns and these columns are orthonormal vectors in R ". Which Not complete of the following is true? Points out of 1.00 Select one: Flag O a. VV is the k x k identity matrix. question O b. V V is the k x k identity matrix. O c. VVT is the n x n identity matrix. O d. V V is the n x n identity matrix. Check Question 5 Let U1 , U2, ... , Ud be an orthonormal basis for R d. Let y = _ _] Civi be an arbitrary Not complete vector in R and let be the subspace spanned by U1 , U2 , ... , Uk for some k