   Chapter 4.2, Problem 59E Finite Mathematics and Applied Cal...

7th Edition
Stefan Waner + 1 other
ISBN: 9781337274203

Solutions

Chapter
Section Finite Mathematics and Applied Cal...

7th Edition
Stefan Waner + 1 other
ISBN: 9781337274203
Textbook Problem

If the reduced matrix of a consistent system of linear equations has five rows, three of which are zero, and five columns, how many parameters does the general solution contain?

To determine

The number of parameters in the general solution of the consistent system of equations whose reduced matrix has 5 rows, 3 of which are zero and five columns.

Explanation

Given Information:

A consistent system of linear equations, whose reduced matrix have 5 rows from which three are zero and has five columns.

Consider a consistent system of linear equations, whose reduced matrix has 5 rows from which three are zero and five columns.

As there are five columns in the reduced matrix there will be four unknowns as the last column if for the right hand sides of the equations.

Now there are 5 rows, 3 out of which are zeroes. This shows that there can be maximum two pivots one in each of the 2 rows left. These pivots have the two unknowns which cannot be the parameters.

For example,

Consider the given condition to form a reduced matrix,

[10002

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