Solving inequalities

11212022, 03:33 PM
(This post was last modified: 11222022 05:12 PM by Albert Chan.)
Post: #5




RE: Solving inequalities
(11162022 10:45 AM)ftneek Wrote: The command I entered on Xcas is Solver probably added some random elements to guess, thus getting different results. Negative solution is tougher, since f(x) = negative ^ negative = complex On XCas 1.5.063 (win32) (old version), I get different results, with repeated solve. [((x>1358.2242733) and (x<4.84957600044e+12))] [((x>1358.22427348) and (x<4.15614031773e+12))] [x>1358.22427318] [x>1358.22427339] [x<1360.05760617,x>1358.22427263] I get the correct result on the fifth tries. The problem is ... we don't know which one to pick. On XCas 1.9.022 (win32) (new version), it crashes every time. On HP emulator Build 2.1.14181 (2018 10 16) (very old), surprisingly, I get good answer for every solve. I had never bother to upgrade {x<−1360.05760747,x>1358.22428117} {x<−1360.05761507,x>1358.22429144} {x<−1360.05760716,x>1358.22430358} {x<−1360.05761158,x>1358.22427617} {x<−1360.05761261,x>1358.22429356} Update Nov 22, 2022: I tried XCas 1.9.0 again. This time no crash, given similar result to XCas 1.5.0 

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Messages In This Thread 
Solving inequalities  ftneek  11162022, 10:45 AM
RE: Solving inequalities  parisse  11162022, 07:25 PM
RE: Solving inequalities  ftneek  11192022, 01:24 AM
RE: Solving inequalities  parisse  11202022, 06:57 PM
RE: Solving inequalities  Albert Chan  11212022 03:33 PM

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