Sep 06, 2010 This video explains how to perform LU decomposition. Please note that P, the permutation matrix, was equal to the identity matrix in this problem. LU Decomposition with the TI-89 Titanium.wmv. View and Download Texas Instruments TI-89 tip list online. Graphing calculator. TI-89 Calculator pdf manual download. Also for: Ti-92+.
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I spotted a possible (and quite usual) problem.When you create a function by using f(s):= anything, the right member is NOT evaluated.It will only be evaluated when you will use the function and replace the value of 's' by any expression.At this time, the calc may see an error such as a 'division by zero' that couldn't be seen earlier.I think that, in your case, exc(s) still has zero as a root of denominator. Or something like that.Did you try to 'disp' some intermediate results to spot the problem more precisely?And what is the error returned?