2s+2t 3s . Show that W is a subspace of R Let W be the set of all vectors of the form by finding vectors u and v such that W = Span{u,v). 3s 4t Write the vectors in W as column vectors. EHRIE 2s +2t 3s #su + tv 3s 4t
Let w be a subspace of R", and let wt be the set of all vectors orthogonal to W. Show that wt is a subspace of R" using the following steps. a. Take z in wt, and let u represent any element of W. Then zu u = 0. Take any scalar c and show that cz is orthogonal to u. (Since u was an arbitrary element of W, this will show that cz is in wt.) b. Take z,...
3 - 2 Let u= Note that {u, v, w} is an orthogonal set of vectors and w - -3 4 9 be a vector in subspace W, where W = Span{u, v, w}. Let y= 11 -27 Write y as a linear combination of u, v, and uw, i.e. y = ciu + cqũ + c3W. Answer: y=
6. Let W be the set of all vectors of the form W {(a,b,c): a – 2b + 4z = 0} Is W a subspace of the vector space V = R3?
2r - 38 + 4t ret Let W be the set of vectors in R4 of the form Is W a subspace of R4? Why or why not? - 8 3s + 3t
(7) Consider the set W of vectors of the form | 4a + 36 1 0 a+b+c c-2a where a,b,c E R are arbitrary real numbers. Either describe W as the span of a set of vectors and compute dim W, or show that W is not a linear subspace of R. (8) Find a basis for the span of the vectors 16115 1-1/ 121, ܘ ܟ ܢܝ
Linear Algebra Advanced
Let A be vectors in R". Show that the set of all vectors B in R" such that B is perpendicular to A is a subspace of R". In other words shovw W Be R"IA B-0 for a vector Ae R" is a subspace.
2 5 Do the vectors u = and v= 3 7 span R3? -1 1 Explain! Hint: Use Let a, a2,ap be vectors in R", let A = [a1a2..ap The following statements are equivalent. 1. ai,a2,..,a, span R" = # of rows of A. 2. A has a pivot position in every row, that is, rank(A) Select one: Oa. No since rank([uv]) < 2 3=# of rows of the matrix [uv b.Yes since rank([uv]) =2 = # of columns of...
Q6. Let W be the subspace of R' spanned by the vectors u. = 3(1, -1,1,1), uz = 5(–1,1,1,1). (a) Check that {uj,uz) is an orthonormal set using the dot product on R. (Hence it forms an orthonormal basis for W.) (b) Let w = (-1,1,5,5) EW. Using the formula in the box above, express was a linear combination of u and u. (c) Let v = (-1,1,3,5) = R'. Find the orthogonal projection of v onto W.
(6 pts) 3. Prove whether or not the set of ordered pairs of the form (w ) is a subspace of R'. (6 pts) 4. Prove whether or not the set of polynomials of the form a+Ox+ax is a subspace of P. 5. Let S = {(2,2,1,6),(1,3,5,1),(1,7,14,-3)} . (6 pts) Is S linearly independent or linearly dependent? (3 pts) b. Find (4 pts) 6. Give three examples of vectors in the span of {0.2.1),(3.1.0);