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16 May, 18:31

Given that the augmented matrix in row-reduced form below is equivalent to the augmented matrix of a system of linear equations. Determine whether the system has a solution and find the solution (s) to the system, if they exist.

[ 1 0 0 0 | - 9 ]

[ 0 1 1 0 | - 8 ]

[ 0 0 0 1 | 1 ]

A) x=-9, y=-8, z=-8, w=1

B) No solution.

C) x=-9, y=-8, z=1

D) x=-9, y=-8+z, w=1, z=any real number

E) z=-9, y=-8-z, w=1, z=any real number

F) None of the above.

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Answers (1)
  1. 16 May, 19:00
    0
    x=9, y = -8-z, w = 1, z=z

    Step-by-step explanation:

    Given that the augmented matrix in row-reduced form below is equivalent to the augmented matrix of a system of linear equations.

    [ 1 0 0 0 | - 9 ]

    [ 0 1 1 0 | - 8 ]

    [ 0 0 0 1 | 1 ]

    We find that this is a rectangular matrix 3 rows and 4 columns

    i. e. the variarables are four but independent equations are only 3.

    so only parametric equations can be found out

    First row gives x = - 9

    Last row gives w = 1

    II row gives y+z = -8 and we do not have any other equation in y or z

    Hence we have solutoin as

    z = z and y - 8-z

    The solution set is

    x=9, y = -8-z, w = 1, z=z
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