Gaussian Elimination or LU

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M
M 2013-3-19
回答： Meysam Mahooti 2019-11-29
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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回答（2 个）

Shashank Prasanna
Shashank Prasanna 2013-3-19
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.
Meysam Mahooti
Meysam Mahooti 2019-11-29

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