MATLAB Answers

Gaussian Elimination or LU

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M
M on 19 Mar 2013
Answered: Meysam Mahooti on 29 Nov 2019
How can i solve this problem?
A=[-1 1 0 0;1 -2 1 0;0 1 -2 1;0 0 1 -1]
and B=[10; 0; 0; -10]
Ax=B
Whats x ?

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Answers (2)

Shashank Prasanna
Shashank Prasanna on 19 Mar 2013
determinant of A is zero, there can be infinite solutions.
One of the infinitely many solutions is the following:
x = pinv(A)*B
of course
x + c*null(A)
for any c are all solutions of the above system.

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