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IDProjectCategoryView StatusDate SubmittedLast Update
0000127KalkulesToolspublic2017-08-02 03:412018-07-10 20:00
Assigned To 
PlatformPCOSWindowsOS VersionAll
Product Version1.9.6.25 
Target VersionFixed in Version1.10.0.26 beta 
Summary0000127: Faulty differentiation of the function (x^2+2x+1)/(x^2+3)
Descriptiondifferentiation of the function (x^2+2x+1)/(x^2+3)
gives in first attempt a red error-message
the function is changed to: ((x^2)+2x+1)/((x^2)+3)
result of the differentiation is: (*(2*x+2)*(x^2+3)-(x^2+2*x+1)*2*x)/(x^2+3)^2 and can't be used for further calculations for the start with (*(...
all further attempts result in faulty: (2*x+2*(x^2+3)-(x^2+2*x+1)*2*x)/(x^2+3)^2
here some Brackets around the first 2*x+2 are missing and making the result faulty
Steps To Reproduceenter fungtion: (x^2+2x+1)/(x^2+3)
   or function: ((x^2)+2x+1)/((x^2)+3)
press the button "differentiate"
in the new opened window press "calculate"
Additional Informationcorrect 1st differentiation for both functions is shown in KALKULES-online with

In Facebook you say, that all the differentiation tool was new written from the scratch for the online-version. Maybe this one should be implemented into the offline-Version too.

Uwe Reisinger
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- Issue History
Date Modified Username Field Change
2017-08-02 03:41 guest New Issue
2018-07-10 20:00 Jardo Status new => resolved
2018-07-10 20:00 Jardo Resolution open => fixed
2018-07-10 20:00 Jardo Fixed in Version => beta

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