[ww-bugs] Bug 3462: New: Question marks answer as incorrect when the correct answer is 0

[bugzilla-daemon at webwork.maa.org]

http://bugs.webwork.maa.org/show_bug.cgi?id=3462

           Summary: Question marks answer as incorrect when the correct
                    answer is 0
           Product: Problem libraries
           Version: unspecified
          Platform: PC
               URL: /opt/webwork/courses/F2015MATH375L01/templates/Library
                    /FortLewis/DiffEq/1-First-order/04-Linear-integrating-
                    factor/KJ-2-3-08.pg_with_problemSeed=2805
        OS/Version: Mac OS
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Library (OPL)
        AssignedTo: jj at asu.edu
        ReportedBy: dglin at math.ucalgary.ca
        Web browser ---
           version:


For the given seed, the correct answer to the second part (inflow
concentration) is 0.  When a student enters 0, it is marked wrong.  I believe
this stems from the use of MathObjects differentiation, which gives a decimal
value for the coefficient.  This leads to terms not quite cancelling where they
should.

There is also an issue with how the correct answers are displayed (missing
parentheses for implied multiplication, making it look like subtraction
instead), but I believe that this issue is a MathObjects bug and not a bug in
the question.

-- 
Configure bugmail: http://bugs.webwork.maa.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching all bug changes.