"TRUE", give an explanation why it's true; if you answer “FALSE", either give an explar or give an example that demonstrates why it's false. (a) If A is a square matrix with det(A³) = 0, then A is not invertible. (b) For any compatible square matrices A and B, det(A+ B) = det(A) + det(B). (c) In R², the set of vectors with x <0 and y < 0 is a subspace. (d) For a 3 x 3 matrix A, det (rA) = r³ det(A). (e) Every change of basis matrix Pc-B is invertible.
"TRUE", give an explanation why it's true; if you answer “FALSE", either give an explar or give an example that demonstrates why it's false. (a) If A is a square matrix with det(A³) = 0, then A is not invertible. (b) For any compatible square matrices A and B, det(A+ B) = det(A) + det(B). (c) In R², the set of vectors with x <0 and y < 0 is a subspace. (d) For a 3 x 3 matrix A, det (rA) = r³ det(A). (e) Every change of basis matrix Pc-B is invertible.
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter10: Inequalities
Section10.1: Order Of Real Numbers
Problem 8OE
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