solve the differential equation

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• Solve the two equations of polynomials.

  Please visit the Hp - page 7-4 user guide.  This shows how to simultaneously solve the two equations X ^ 2 + XY = o and X ^ 2 - Y ^ 2 = - 5 using the function, resolve

  I've tried everything.

  Thank you

  johben

  ALG:

  [X ^ 2 + X * Y = 10, X ^ 2-Y ^ 2 = - 5]

  RPN:

  ["X ^ 2 + X * Y = 10' ' X ^ 2-Y ^ 2 = - 5 '"]

• First HP: differential equation solver...

  Hi all

  I would like to know how to use HP first to solve the differential equation

  
  
  I tried to read the user manual, but with no luck.

  Tim

  Hi!, @Theplum:

  Welcome to Forum!

  If you learn properly the use of desolve, you see, better explained in the AUR HP50G, of...

  [PDF] HP 50 g / 49 g + / 48gII graphing calculator

  h10032.www1.HP.com › manual GTC

• differential equation

  Dear Sir

  I am a beginner in labview and I would like to solve two differential equations and field them over time:

  DX1/dt = (G - K * x 1 (t)) /V (t)

  dV (t) /dt = (1/((1-(((G-x1*(K-U))/(G-x0*(K-U)))^((U/(K-U)))-1))*U

  G = 7.8

  U = 0,166

  x 0 = 132

  VO = 432

  K = 2.02

  Could someone please help me and send the block diagram for these two equations.

  The graphs of these two variables have to be reduced over time. The graph of X 1 is of exponential decay.

  Hello Ahmad,

  I made a simple example and put it on our community page.  This example uses our ODE solver vis LabVIEW comes with 8 built in ODE solvers.  These are all linear system solvers.  It seems that your equations are not linear. I suggest using the LaPlace transforms to solve equations.

  Code example

• Algebraic manipulations of solutions to differential equations

  Hi, guys

  I found the general solution of the differential equation y "-3 t = 1 using the command DESOLVE. I did it manually first and the answer I got was: 1/2 t ^ 3 + 1/2 t ^ 2 + C1t + C2; However, when I do with the calculator that I get is: (2cC0 + t * cC1 2 + t ^ 3 + t ^ 2) / 2.  I tried everything in the ALG menu to get rid of the 2 in the denominator. Nothing has worked.  I'm in Exact, symbolic mode.  Am I missing something?

  Thank you very much!

  Hi!, jc_cfa:

  If you have RPN MODE...

  

  Configure the FLAGS ...

  Function 03-> symb

  Approx. 105 mode on

  Calculator modes

  Number format... STD

  

• How to solve the cube root?

  How to solve the cubic equation?

  a x ^ 3 + x b ^ 2 + c x + d = 0.

  Polynomial roots.

• Just me, or is the 50g low in solving differential equations?

  Hi all

  I used Ti-89 s widely in the past, as well as the Ti-NSpire CX CASE and now the 50 g for about 1.5 years. I love some aspects of the 50g (sensation of keys, ease of unit, RPN conversion), but I can't help but notice some areas where it reallllly hangs out of the competition.

  It is an example that I really noticed recently in solving differential equations. So far, several examples I've tried (all immediately resolved by my Ti - 89 and Nspire CX CASE), the 50g smothered on each.

  A very simple example: solve y "= - 9.8, with boundary conditions y (0) = 2.9 and y'(0) = 3.8.  This can be solved by hand in about one minute, but the 50g can't do. If I input ['d1d1Y (X) =-9.8' ' Y (0) = 2.9 ' ' d1Y (0) = 3.8 '] in level 2 on the stack, then 'Y' on a level and then run desolve, it returns "Error: Undefined result.

  I missing something here, or is - this really unable to resolve such a differential equation based? I thought that advanced and 'better' mathematical capacity HP CASE was meant to be one of the reasons why it takes precedence over offers from Ti, but I must say, so far I do not see that.

  Josh

  Hello!

  Try with the exact numbers:

  ["d1d1Y (X) =-49/5 ' ' Y (0) = 29/10 ' ' d1Y (0) = 19/5 '"]

  « Y »

  DESOLVE

  (after SIMPLIFICATION) You'll get years:

  {Y (X) =-(49*X^2-38*X-29)/10}

• The first (emulator) HP: HP Premium differential equations

  Hello

  I'm looking a calculator with AC for my electrical engineering studies and just tested

  the first emulator to get a first impresseion.

  But while testing its features, I got some results of unexpectet on differential equations,
  that I would be confirmed on a calculator of real world.

  A simple as equation y' = x

  CODE: desolve (diff (y) = x, x, y)
  
  wait-> x ^ 2/2 + C
  
  First HP-> 1/2 * (x ^ 2 + 2 * C).

  The result is correct, but nobody would write it down in this way, nor would one solve it how works the first.

  A little more difficult equation could not be resolved by the premium: 2 x ^ 3 * (1 + y ^ 2) = y'

  CODE: desolve (2 * x ^ 3 *(1+y^2) = diff (y), x, y)
  
  wait-> y = tan (1/2 * x ^ 4 + C).
  
  First HP-> could not resolve the implicit equation

  It is not an implicit equation, the two WolframAlpha (iOS) and CASES of TI (iOS) could also resolve this one)

  And last but not least: y' * sin (x) = y * ln

  CODE: desolve (diff (y) * sin (x) = y * ln (y), x, y)
  
  wait-> y = e ^ (C * tan (x/2))
  
  First HP-> y = e ^ (sqrt (cos (x) ^ 2-1) / (C * cos (x) + C))

  I don't know what made the CASE here, but there is no reason to use the Pythagorean trigonometric identity.

  Would be nice if someone with a premium could conifrm/refute these results or tell me what I've done
  evil.

  Hello

  The latest version of premium can solve your 2nd test case (desolve ((2 * x ^ 3 *(1+y^2)) = (y'), x, y))

  However, the results for 1 and 3 test cases are the same that you tested.

  I will pass the info to the person who develops the CASE and if all goes well he will be able to improve it.

  Cyrille

• Solve the ODE which uses a max() function

  I have an ODE that I would like to solve in labview, but it's the max() for the third function OF. How can I integrate this into the Solver, RK4? I also apply it over a period of ten minutes (t here is in minutes), so I would put the RK4 Solver within some set time the end time to be 10 + loop with a start time register offset, or simply? I've included the variables + constants table for your reference.

  

  

  I do not understand your question about the error. Comments about all numerical values are already doubled.

  I found the basic problem. Column to 1 d array.vi returns an array containing a single element. This causes the Solver RK choke because it needs of 4 elements. The solution is to use only the Index table. This version converge in about 11 iterations.

  The solution seems to be sensitive to the value of h, so something's not quite yet. Fixing that may depend on your knowledge of what represent equations.

  I enclose the things that I've changed. In the f picker.vi I added the * as mentioned previously. I also reformatted some constants, although I think it was unnecessary. In the Main VI, I added a bunch of indicators so I could see what was going on. These indicators led me to the size of the array, I also added a waiting for me to see the results of each iteration. You will want to remove that in your final version.  I've implemented a "approximately equal" function to stop the loop. I put it as stop on an error.

  I consider calculate two options outside the loop and then simply select the one you want on the inside. No time to run, but if you need hundreds or thousands of iterations to solve the equations we can add.

  Lynn

• Plugin Adobe Flash keeps crashing, and or refreshing it or Firefox solves the problem.

  I tried to update Adobe Flash and reload also Firefox but nothing has solved the problem.

  You have already disabled the functionality of the protected mode? This feature has the security benefits, but it seems to have serious compatibility problems on some systems. There is a hidden parameter to disable; I suggest to try it for a day to see if that helps you:

  (A) in a new tab, type or paste Subject: config in the address bar and press ENTER. Click on the button promising to be careful.

  (B) in the search above the list box, type or paste the flash and make a pause so that the list is filtered

  (C) double-click the preference dom.ipc.plugins.flash.disable - protected mode to change its value from false to true.

  It cannot take effect until all the Flash was discharged for a few minutes, or you close Firefox.

  One of your crash signatures (_SEH_prolog4) reminded me of a thread where a user was very persistent problems with Flash on YouTube if Webroot and LastPass were both installed. It seems that you run Norton, so that the thread is probably not directly relevant.

  Would you consider trying the "Extended Support Release" of Flash version instead of the version 18? Adobe is now updated with security patches, but some recently added features Flash would be absent.

  If you want to try this, you will need to use Adobe uninstaller to remove the current version (link in: Flash Plugin - keep up-to-date and solve problems) and then get version 13.0.0.309 from this page (scroll down about 2/3 of the way):

  https://www.Adobe.com/products/flashplayer/distribution3.html

  Choose the EXE or MSI for 'plugin browsers.

• This update will solve the issue of "beach ball"?

  Will this update the problem of 'beach ball' where my iMac freezes randomly & have to reboot?

  N ° there is no widespread problem in a first time. Update of a machine that has a pre-existing problem will not solve the problem. You need your fix.

  Download etrecheck, run it and post the report here. It will give information you on what can cause your system to bog down.

• Firefox 34.0.5 cannot print correctly. I checked all the pages on firefox problems and still can not solve the problem.

  I use 34.0.5 with Windows 7 and that you cannot print correctly. In print preview, it appears in a label size. I double checked all my settings in firefox and my preferences from the printer, I checked all the pages on firefox problems and still can not solve the problem.

  I was able to finally solve the problem, but I had to do a complete reset of firefox. Thank you for your time.

• I put my yahoo homepage, but every time I open mozilla home page is webssearches I reset firefox, but it does not solve the problem, what to do now?

  My homepage is set to yahoo, but mozilla opens with http://istart.webssearches.com as start page. Same reset does not solve the problem. I think that I have installed a software that installed this. My default search engine is Google. Kindly help me, is there something to do in all: config?

  See this tutorial - http://malwaretips.com/blogs/istart-webssearches-com-removal/

• Google Calendar becomes inactive in Firefox. Reset Firefox solves the problem for some time (sometimes minutes), then it becomes inactive.

  Google Calendar becomes inactive in Firefox. Can not navigate, cannot change the appointments, can only view an appointment, then freezes and nothing is more possible.
  Reset Firefox solves the problem for some time (sometimes minutes), then it becomes inactive.
  Firefox 28.0, Windows 7.
  Google Calendar is OK in Android and syncs with my PC OK.
  Works fine in Internet Explorer.
  Please notify.

  The extension Freeven pro is probably the problem. Only that disable and check again.

  If you have the same problem after having disabled the extension pro Freeven then, disable graphics hardware acceleration.

  You will have to perhaps restart Firefox for it to take effect, so save any work first (e.g. you compose mail, documents online that you are editing, etc.).

  Then perform the following steps:

  • Click on the orange top left Firefox button, then select the 'Options' button, or, if there is no Firefox button at the top, go to tools > Options.
  • In the Firefox options window, click the Advanced tab, and then select 'General '.
  • You will find in the list of parameters, the checkbox use hardware acceleration when available . Clear this check box.
  • Now restart Firefox and see if the problems persist.

  In addition, please check the updates for your graphics driver by following the steps in the following knowledge base articles:

  • Troubleshoot extensions, themes, and issues of hardware acceleration to resolve common problems of Firefox
  • Update your graphics drivers to use hardware acceleration and WebGL

  In safe mode hardware, acceleration is disable by default.

  Thank you.

• My ipod video 5th generation won't play of smart playlists in order with 12.4 itunes, itunes can not remember how to sort things either. When you going to solve the problem?

  My iPod video 5th generation won't play of smart playlists in order with 12.4 iTunes, iTunes can not remember how to sort things either.

  When you going to solve the problem?

  Can I do to solve this problem?

  Use the view of songs to set the order you want. Right-click on the name of the playlist in the left sidebar, and then select copy to Play Order in the context menu. Sort the list on the left most column of numbers, or use view > sort by > order of Playlist. Device synchronization.

  TT2