Problem 2. For any matrix A € M„(F), show that (Ar, y) = (x, A*y) for all a, y E F". Use this to show that R(LA•) = N(LA). %3D

Linear Algebra: A Modern Introduction
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ISBN:9781285463247
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Chapter6: Vector Spaces
Section6.2: Linear Independence, Basis, And Dimension
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Problem 2. For any matrix A E M,(F), show that (Ar, y) = (x , A*y) for all a, y € F".
Use this to show that R(LA-)+ = N(LA).
%3D
Problem 3. Let V be a finite-dimensional inner product space, and let W C V be a
subspace. Show that (W-)- = W.
Transcribed Image Text:Problem 2. For any matrix A E M,(F), show that (Ar, y) = (x , A*y) for all a, y € F". Use this to show that R(LA-)+ = N(LA). %3D Problem 3. Let V be a finite-dimensional inner product space, and let W C V be a subspace. Show that (W-)- = W.
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