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 October 9th, 2015, 07:39 AM #1 Banned Camp   Joined: Mar 2015 From: New Jersey Posts: 1,720 Thanks: 126 Why Doesn't This Work Consider Ax=0 $\displaystyle \begin{vmatrix} a_1_1\\ a_2_1\\ a_3_1\\ a_4_1\\ a_5_1 \end{vmatrix}x_1 + \begin{vmatrix} a_1_2\\ a_2_2\\ a_3_2\\ a_4_2\\ a_5_2 \end{vmatrix} x_2 +\begin{vmatrix} a_1_3\\ a_2_3\\ a_3_3\\ a_4_3\\ a_5_3 \end{vmatrix} x_3 =0$ Last edited by zylo; October 9th, 2015 at 07:56 AM. October 9th, 2015, 08:43 AM #2 Banned Camp   Joined: Mar 2015 From: New Jersey Posts: 1,720 Thanks: 126 But this works!? $\displaystyle \begin{pmatrix} a1 &a2 &a3 \\ b1 &b2 &b3 \end{pmatrix} x_1=0$ October 9th, 2015, 10:02 AM #3 Banned Camp   Joined: Mar 2015 From: New Jersey Posts: 1,720 Thanks: 126 $\displaystyle \begin{vmatrix} a11\\ a21\\ a31\\ a41\\ a51 \end{vmatrix}x1+\begin{vmatrix} a12\\ a22\\ a32\\ a42\\ a52 \end{vmatrix}x2+\begin{vmatrix} a13\\ a23\\ a33\\ a43\\ a53 \end{vmatrix}x3=0$ It didn't like double subscripts in the matrix. a1_1 ok, a_1_1 ng October 9th, 2015, 11:24 AM #4 Global Moderator   Joined: Dec 2006 Posts: 20,969 Thanks: 2222 I suspect you want this: $\displaystyle \begin{vmatrix} a_{11} \\ a_{21} \\ a_{31} \\ a_{41} \\ a_{51} \end{vmatrix}x_1 + \begin{vmatrix} a_{12} \\ a_{22} \\ a_{32} \\ a_{42} \\ a_{52} \end{vmatrix} x_2 +\begin{vmatrix} a_{13} \\ a_{23} \\ a_{33} \\ a_{43} \\ a_{53} \end{vmatrix} x_3 = 0$ Thanks from zylo Tags work Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post uint Calculus 4 November 28th, 2014 11:53 PM redharo Computer Science 4 June 4th, 2013 01:30 PM dottywine Calculus 9 November 29th, 2008 10:57 PM

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