A Set Having a Unique Solution Matlab Help

A Set Having a Unique Solution

Determine whether the following set has a unique solution, and if so, find it:

3x – 2y + 8z = 48 –
-6x+5y+i=-12
9x + 4y + 2z = 24

Capture

ans =
3
»rank ([A b))
ans
3
»x A\b
x
2
-1
5
Because A and [A b] have the same rank, a solution exists. Because this rank equals the number of unknowns (which is three), the solution is unique. The left-division method gives this solution, which is x = 2, y = -1, z = 5.

Posted on July 30, 2015 in Linear Algebric Equations

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