ENGR 1405 Engineering Mathematics 1

Faculty of Engineering and Applied Science
2000 Fall


Problem Set 2
Questions

A set of instructions on how to use Dr. George’s row reduction computer program is available at this link.


 

For each of the following systems of linear equations

(i)

rewrite as a matrix equation

(ii) identify the coefficient matrix, the matrix of constants, and the augmented matrix
(iii) use elementary operations to reduce the augmented matrix to either row echelon form, or reduced row echelon form
(iv) write the solution, if any, of the system of linear equations


  1.  
    x   +   3y   -   2z   =   8
    3y   -   5z   =   11
    2x   +   5y   -   8z   =   19


  1.  
    -3x   +   6y   +   16z   =   36
    x   -   2y   -   5z   =   -11
    2x   -   3y   -   8z   =   15


  1.  
    3x   +   2y   -   z   =   4
    2x   +   5y   +   z   =   10
    4x   +   9y   -   z   =   -21


  1.  
    x   +   2y   -   3z   =   -5
    2x   +   4y   -   6z   +   w   =   -8
    6x   +   13y   -   17z   +   4w   =   -21


  1.  
    x   +   2y   -   3w   =   4
    2x   +   4y   +   z   -   6w   =   -8
    3x   +   6y   -   2z   -   2w   =   12


  1.  
    x1   -   3x3   -   x5   =   1
    x2   -   2x3   -   x4   =   -2
    x1   +   x2   -   5x3   -   x4   -   x5   =   -1
    2x1   -   3x2   +   2x4   =   4