8. Let R2x2 be the vector space of 2 x 2 real matrices. A basis for R2x2 is 0 1 |0 0 1 0 0 0 0 Let f : R2x2 → R be a linear transformation such that f(I2) = 2 and f(AB) = f(BA) for any A, B E R²×2. Use the above basis to prove that f(A) = a1,1 + a2,2 for any matrix A E R2X2.
8. Let R2x2 be the vector space of 2 x 2 real matrices. A basis for R2x2 is 0 1 |0 0 1 0 0 0 0 Let f : R2x2 → R be a linear transformation such that f(I2) = 2 and f(AB) = f(BA) for any A, B E R²×2. Use the above basis to prove that f(A) = a1,1 + a2,2 for any matrix A E R2X2.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.6: Introduction To Linear Transformations
Problem 54EQ
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