Unformatted text preview: dimensional. a. If dim(V) = 5, dim(W) = 3, and dim(ker(T))= 2, then T is onto. b. If ker(T) = V, then W = { 0 }. 2) In each case, (i) find a basis of ker(T), and (ii) find a basis of range(T) a. T: M 22 → R; d a d c b a T ; b. T: P 2 → R 2 ; T(a + bx + cx 2 ) = (a, b). 3) Let T: M nn → R denote the trace map: T(A) = tr(A) for all A in M nn . Show that dim(ker(T)) = n 2 – 1. (hint: dimension theorem) 4) Given n v v v ..., , , 2 1 in a vector space V, define T: R n → V by n n n v r v r v r r r r T ... ..., , , 2 2 1 1 2 1 . Show that T is linear, and that: a. T is onetoone if and only if n v v v ..., , , 2 1 is independent. b. T is onto if and only if V = sp n v v v ..., , , 2 1 . Note: There are answers at the back of the textbook for the odd number questions....
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 Fall '09
 YANG
 Linear Algebra, Algebra, Fraleigh

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