1. Consider the mapping (,): R2 x R² → R defined by (u,v) = u³ Du, Vu, v € R², where = »-(62) such that d1, d2 >0. Prove that (,) is an inner product.
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- Justify that (•, ·) defines an inner product on R?. the function (', ·) defined on R? as follows: (u, v) := 5u1v1 – 2u1V2 – 2uzv1 + 4uQV2, U1 where u = v1 V = E R? U2 V211. Let (V, (, )) be a complex inner product space. For vectors v, w, set (v, w) R = ¹/[(v, w)+(w, v)]. Consider V to be a real vector space. Is (V, (, )R) an inner product space? Support your answer with a proof.56. Which vector spaces are isomorphic to R6? (c) C[0, 6] (f) C'[-3, 3] (b) Р. (a) M23 (d) M6,1 (e) P5 (g) {(x1, X2, X3, 0, x5, X6, X7): x; is a real number}
- Show that the following functions define an inner product on (R)2 where U= (x,y) and V= (x2,y2) a) <U,V> = 3x1x2 + y1y2 b) <U,V> = (x1x2)/2 + (y1y2)/43. Let V denote the vector space of all functions f : R" → R, equipped with addition + : V × V → V defined via (ƒ+g)(x) = f(x)+ g(x), x ≤ R", and scalar multiplication : R × V → V defined via (\ · ƒ)(x) = \ƒ(x), ● x ER". Rº Now let W = {ƒ : R^ → R : ƒ(x) = ax + b for some a, b € R}, i.e. the space of all linear functions R" → R. (a) Find a basis for W. You should prove that it is indeed a basis.Determine if the function defines an inner product on R², where u = (u, v) = ₁V₁ satisfies (u, v) = (v, u) does not satisfy (u, v) = (v, u) satisfies (u, v + w) = (u, v) + (u, w) does not satisfy (u, v + w) = (u, v) + (u, w) satisfies c(u, v) = (cu, v) > U does not satisfy c(u, v) = (cu, v) satisfies (v, v) ≥ 0, and (v, v) = 0 if and only if v = 0 does not satisfy (v, v) ≥ 0, and (v, v) = 0 if and only if v = 0 X (U₁U₂) and v = (V₁, V₂). (Select all that apply.)
- True or False: (p, q) = pq defines an inner product on P(R).Define a function f : C -> C by f(x+iy) = (x+2y) + i(3x+4y) for x,y in R. Show that f is additive (i. e. satisfies f(v+w) = f(v)+f(w) for v,w in C) but not linear as a map of complex vector spaces. Show however that if we define f as the map f : R^2 -> R^2 given by f(x,y) = (x+2y, 3x+4y) then f is linear as a map of real vector spaces.Let U,V ,W be finite-dimensional F-vector spaces and let T:U → V, S:V→W be linear transformations. Prove that nullity(S • T) - nullity(T ) = dim(im(T ) N ker(S)) following steps (a)-(c) below. a) LetU:=ker(S-T)andT:=T|u.Prove:im(T').=T(U')=im(T)N ker(S ). b) Prove:ker(T')=ker(T). c) Deduce:nullity(S•T)-nullity(T)=dim(im(T)nker(S)).
- 5. Determine whether the set of all ordered triples of real numbers with the op- erations defined below: (x, y, z) + (x',y',z') = (x+x',y+y',z+z') k(x, y, z) = (x, 1,z) is vector space or not.22. Show that there do not exist scalars c₁, c₂, and c² such that c₁(1,0, 1,0) + c₂(1, 0, −2, 1) + c3(2, 0, 1, 2) = (1, -2, 2, 3)3. (12) Let V = R². Define vector addition and scalar multiplication as follows: (u1, uz)O(v1, v2) = (u1V1, U2V2) and c(u1,u2) = (u,C, u2^), c > 0 (a) Does V have an additive identity? If so, what would it be? (b) Does the distributive axiom c(uOv) = cu@cv hold? (Show why or why not). 4