Augmented Matrix In Exercises 11-18, find the solution set of the system of linear equations represented by the augmented matrix.
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Chapter 1 Solutions
Elementary Linear Algebra
- Writing an Augmented Matrix: In Exercises 15-20, write the augmented matrix for the system of linear equations. 2x4y+z=136x7z=223xy+z=9arrow_forwardHomogeneous System In Exercises 43-46, solve the homogeneous linear system corresponding to the given coefficient matrix. [10010100]arrow_forwardUsing a Graphing Utility: In Exercises 79-84, use the matrix capabilities of a graphing utility to write the augmented matrix corresponding to the system of linear equations in reduced row-echelon form. Then solve the system. 3x+3y+12z=6x+y+4z=22x+5y+20z=10x+2y+8z=4arrow_forward
- Writing a System of Equations: In Exercises 21-26, write the system of linear equations represented by the augmented matrix. (Use variables x, y, z and w, if applicable.) 4511811062538029arrow_forwardMatrix sizeIn Exercises 1-6, determine the size of the matrix. [124346012]arrow_forwardFill in the blanks. If A is an invertible matrix, then the system of linear equations represented by AX=B has a unique solution given by X=.arrow_forward
- Comparing Linear Systems and Matrix Operations: In Exercises 39 and 40, (a) perform the row operations to solve the augmented matrix, (b) write and solve the system of linear equations (in variables x, y, and z, if applicable) represented by the augmented matrix, and (c) compare the two solution methods. Which do you prefer? 7131435143612 i Add R2 to R1. ii Multiply R1 by 14. iii Add R3 to R2. iv Add 3 times R1 to R3. v Add 2 times R2 to R1.arrow_forwardMatrix Representation In Exercises 49 and 50, assume that the matrix is the augmented matrix of a system of linear equations, and a determine the number of equations and the number of variables, and b find the values of k such that the system is consistent. Then assume that the matrix is the coefficient matrix of a homogeneous system of linear equations, and repeat parts a and b. A=[21342k426]arrow_forwardWriting Let x be a solution to mn homogeneous linear system of equations Ax=0. Explain why x is orthogonal to the row vectors of A.arrow_forward
- Calculus In Exercises 35 and 36, find the values of x,y, and that satisfy the system of equations. Such systems arise in certain problems of calculus, and is called the Lagrange multiplier. 2x+=02y+=0x+y4=0arrow_forwardSolve the homogeneous linear system corresponding to the coefficient matrix. [121200242412]arrow_forwardSolving a Linear System Using LU-Factorization In Exercises 47 and 48, use an LU-factorization of the coefficient matrix to solve the linear system. 2x+y=1 y-z=2 -2x+y+z=-2arrow_forward
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