Mathematics, 20.09.2019 22:00 rmathias485
Let a be as above, consider ax = b where b = (31, 2, 21, 11). find x1 using cramer’s rule. (you may use matlab/octave to compute the determinants, but write out what you are
matrix a= 8 6 -3 20
4 2 -5 -7
8 2 7 20
4 2 -11 -4
Answers: 2
![A=\left[\begin{array}{cccc}8&6&-3&20\\4&2&-5&-7\\8&2&7&20\\4&2&-11&-4\end{array}\right]](/tpl/images/0247/5323/e77f6.png)
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, where 
is the same matrix A change the first column of A by b. Then ![A_1=\left[\begin{array}{cccc}31&6&-3&20\\2&2&-5&-7\\21&2&7&20\\11&2&-11&-4\end{array}\right]](/tpl/images/0247/5323/46f07.png)
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Let a be as above, consider ax = b where b = (31, 2, 21, 11). find x1 using cramer’s rule. (you may...
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