18. (T 1) (core) Is the following linear transformation injective? Surjective? (Justify both with full sentences). T(x, y, z) = (x − 6y, y − 12z, x+8z)
Chapter 1 Linear Equations in Linear Algebra
1-1 Systems of Linear Equations
1-2 Row Reduction and Echelon Forms
1-3
1-4 The Matrix Equation Ax = b
1-5 Solution Sets of Linear Systems
1-6 Applications of Linear Systems
1-7 Linear Independence
1-8 Introduction to Linear Transformations
1-9 The Matrix of a Linear Transformation
Chapter 2 Matrix Algebra
2-1 Matrix Operations
2-2 The Inverse of a Matrix
2-3 Characterizations of Invertible Matrices
2-4 Partitioned Matrices
2-5 Matrix Factorizations
2-6 The Leontief Input-Output Model
2-7 Applications to Computer Graphics
Chapter 3 Determinants
3-1 Introduction to Determinants 172
3-2 Properties of Determinants 179
3-3 Cramer's Rule, Volume, and Linear Transformations
Chapter 4 Vector Spaces
4-1 Vector Spaces and Subspaces
4-2 Null Spaces, Column Spaces, Row Spaces, and Linear Transformations
4-3 Linearly Independent Sets; Bases
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