Is W = {(x, y, z, w) | x − y = 2z + w & w − y = 2x + 3z} a subspace? Justify your answer. If it’s a subspace, find a basis for W and compute dim W.
1. Prove that each of the following is a subspace. (a) W = {x: x = (x 1, 22, 23) and X1 + 12 = x;} (b) W = {p: p(t) = ata + b + c and a+b+c=0} (C) W = {A € R2x2 and A is upper triangular) (d) W = {f:f EC(0,1) and f(0 =0} 2. Show that the following subsets of A R2x2 are not subspaces. (a) W = {A : A is the singular matrix}...
Problem 4 Let W a subspace of R4 with a set of basis: 1 [01 [2] 0 11 lo lo] Li Find and orthonormal basis for W! Problem 4 Let W a subspace of R4 with a set of basis: 1 [01 [2] 0 11 lo lo] Li Find and orthonormal basis for W!
w is orthogonal to CI,2,3,413. A) Is W a Subspace of R Prove ans wer. 8) If w i5 a subspace, find o basis C) What is the dlimension of w?
1- 2- (10 points) Find the closest point to y in the subspace W spanned by vì and v2. -4 -2 у 0 -1 0 -1 2 3 1 1 1 1 (10 points) The given set is a basis for a subspace W. Use 0 0 0 the Gram-Schmidt process to produce an orthogonal basis for W.
0 5 The set of vectors {x1, x2} spans a subspace W of R3, where x1 = 19- and X 2 -- 2 (a) Use the Gram-Schmidt process to find an orthogonal basis for W. (b) Then normalize this new basis, so that it is an orthonormal basis. (c) Once you've found an orthonormal basis, demonstrate that it is indeed orthogonal after normalization. (d) For a bonus 2 points, calculate a third vector orthogonal to your basis and normalize it...
Q 1 Let V C R3 be the subspace V = {(x,y, z) E R3 : 5x 2y z 0} a) Find a basis B for V. What is the dimension of V? b) Find a basis B' for R3 so that B C B'
Q9. Let W be a subspace of R". (a) Prove that w+ is a subspace of R". (b) Prove that if a vector v belongs to both W and W+, then v must be the zero vector.
4 | , y-| 4 | and W be the subspace of R3 spanned by x and y 5. Let x 5c. Apply the Gram -Schmidt orthogonalization process to construct an orthonormal basis of W.
3. (a) Show the set of all matrices of the form х A у x + y + z 2 is a subspace of the vectors space M2(R) of all 2 x 2 matrices with entries in R. (b) Find a basis for this subsace and prove that it is a basis. (c) What is the dimension of this subspace?