ibfrustratesme Posted February 7, 2013 Report Share Posted February 7, 2013 Hey guys, this is probably a stupid question, but i really suck at math So if anyone cold help me out with this question, would be great! Having these equations:204= a(52)^3+b(52)^2+c(52)+d(1)216= a(60)^3+b(60)^2+c(60)+d(1)224= a(68)^3+b(68)^2+c(68)+d(1)225= a(76)^3+b(76)^2+c(76)+d(1)Simplified:204= a(140608)+b(2704)+c(52)+d216= a(216000)+b(3600)+c(60)+d224= a(314432)+b(4624)+c(68)+d225= a(438976)+b(5776)+c(76)+dhow do i find the parameters(with my gdc) ? Thanks for your help! Reply Link to post Share on other sites More sharing options...
Negotiation Posted February 7, 2013 Report Share Posted February 7, 2013 (edited) Solving multi-variable equations on a GDC is somewhat challenging. However, you can do it with matrices:The following are all 4-row matrices (3 in total)(140608, 2704, 52, 1) (a ) = (204)(216000, 3600, 60, 1) (b ) = (216)(314432, 4624, 68, 1) (c ) = (224)(438976, 5776, 76, 1) (d ) = (225)Plug in the two with numbers in your GDC (The 4x4 as A and the other as B). Then you can solve for the unknowns by calculating A^(-1)*B Edited February 7, 2013 by Negotiation 2 Reply Link to post Share on other sites More sharing options...
Fermat Posted February 12, 2013 Report Share Posted February 12, 2013 If you have a TI-83/84 you should have an app called PLYSMLT (or something similar) and it has a system of equations solver. Reply Link to post Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.