HP Forum Archive 21

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Does Prime Have a Multiple Equation Solver? Message #1 Posted by Norman Dziedzic on 18 Sept 2013, 9:22 a.m. I use my 50g a lot with MSOLVR and am wondering if the Prime has a similar functionality? Thanks,

Re: Does Prime Have a Multiple Equation Solver? Message #2 Posted by Eddie W. Shore on 19 Sept 2013, 4:07 p.m., in response to message #1 by Norman Dziedzic Yes. The Solve app is updated so it can solve multiple amount of equations. Example in Symb View of the Solve app: E1: 2*A + 3*B = 1 E2: B^2 = 4*A + 3 With E1 and E2 checked, go to Num View and select A and B to be solved for. One solution is: A = -.612486080161 B = .741657386774

Re: Does Prime Have a Multiple Equation Solver? Message #3 Posted by Norman Dziedzic on 20 Sept 2013, 9:43 a.m., in response to message #2 by Eddie W. Shore I only have the emulator so I don't know if this is still true on the real deal but this doesn't quite work for how I use MSOLVR. With the solve app it seems if you have 3 equations you only get 3 variables. With MSOLVR, I get to enter some variables and then ask to solve for another that I didn't enter. If there is enough information in the other equations, then it gives me a result and if not it lets me know. Simple Example for what I call trapazoidal motion of a particle. My definition of this is a particle had constant acceleration for 1/3 of the time of the move, a constant velocity for 1/3 of the time of the move and constant deceleration (same as acceleration) for the last 1/3 time of the move. In industry, this is many times a nice approximation of the best balance between energy consumption and speed.. Many times we are using a motor an screw to produce this motion so I have an equation related to that as well. So I have the following variables: v: Constant Velocity t: total move time a: constant acceleration s: move distance N: screw RPM p: screw pitch And the following 3 equations: v=(3*s)/(2*t) a=(9*s)/(2*t^2) N=v/p When I start the solver i get function key menus for all the variables. I know in my head which ones I need to solve for the other ones. So I know I can put in time and distance and get out velocity and acceleration. I can put in velocity and time and get out distance. etc. I only have 3 equations but 6 variables. But because of the way the equations are linked, the MSOLVR keeps searching to see if it has enough information to solve for my requested variable. I don't see that functionality in the Prime emulator.

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