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5. For each of the statements given below decide if it is true or false. If it is true explain why. If it is false give a counterexample. a) If A, B are matrices such that AB is defined and is a square matrix (i.e. it has the same number of rows and columns) then BA is also defined. b) If A is an 2 x 2 matrix such that Av = 0 for some non-zero vector v € R² then A cannot be invertible. c) If {V₁, V₂} is a linearly independent set of vectors in R2 and T: R² →→>> R² is a linear transformation then the set {T(v₁), T(v₂)} must be also linearly independent. d) If u, v, w are vectors in R² such that u is in Span(v, w) then v must be in Span(u, w).

5. For each of the statements given below decide if it is true or false. If it is true explain why. If it is false give a counterexample. a) If A, B are matrices such that AB is defined and is a square matrix (i.e. it has the same number of rows and columns) then BA is also defined. b) If A is an 2 x 2 matrix such that Av = 0 for some non-zero vector v € R² then A cannot be invertible. c) If {V₁, V₂} is a linearly independent set of vectors in R2 and T: R² →→>> R² is a linear transformation then the set {T(v₁), T(v₂)} must be also linearly independent. d) If u, v, w are vectors in R² such that u is in Span(v, w) then v must be in Span(u, w).

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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5. For each of the statements given below decide if it is true or false. If it is true explain why. If it is false give a counterexample. a) If A, B are matrices such that AB is defined and is a square matrix (i.e. it has the same number of rows and columns) then BA is also defined. b) If A is an 2 x 2 matrix such that Av = 0 for some non-zero vector v € R² then A cannot be invertible. c) If {V₁, V₂} is a linearly independent set of vectors in R2 and T: R² →→>> R² is a linear transformation then the set {T(v₁), T(v₂)} must be also linearly independent. d) If u, v, w are vectors in R² such that u is in Span(v, w) then v must be in Span(u, w).
Transcribed Image Text:5. For each of the statements given below decide if it is true or false. If it is true explain why. If it is false give a counterexample. a) If A, B are matrices such that AB is defined and is a square matrix (i.e. it has the same number of rows and columns) then BA is also defined. b) If A is an 2 x 2 matrix such that Av = 0 for some non-zero vector v € R² then A cannot be invertible. c) If {V₁, V₂} is a linearly independent set of vectors in R2 and T: R² →→>> R² is a linear transformation then the set {T(v₁), T(v₂)} must be also linearly independent. d) If u, v, w are vectors in R² such that u is in Span(v, w) then v must be in Span(u, w).
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