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AlgEquivNouns: Answer test results

This page exposes the results of running answer tests on STACK test cases. This page is automatically generated from the STACK unit tests and is designed to show question authors what answer tests actually do. This includes cases where answer tests currentl fail, which gives a negative expected mark. Comments and further test cases are very welcome.

AlgEquivNouns

Test
?
Student response
Teacher answer
Opt
Mark
Answer note
AlgEquivNouns 
1/0
 
1
 -1 ATAlgEquivNouns_STACKERROR_SAns.
TEST_FAILED
The answer test failed to execute correctly: please alert your teacher. Division by zero.
AlgEquivNouns 
1
 
1/0
 -1 ATAlgEquivNouns_STACKERROR_TAns.
TEST_FAILED
The answer test failed to execute correctly: please alert your teacher. Division by zero.
AlgEquivNouns 

  
(x-1)^2

  
  -1
  ATAlgEquivNounsTEST_FAILED-Empty SA.




  
  The answer test failed to execute correctly: please alert your teacher. Attempted to execute an answer test with an empty student answer, probably a CAS validation problem when authoring the question.




  AlgEquivNouns
  
  
x^2

  

  
  -1
  ATAlgEquivNounsTEST_FAILED-Empty TA.




  
  The answer test failed to execute correctly: please alert your teacher. Attempted to execute an answer test with an empty teacher answer, probably a CAS validation problem when authoring the question.




  AlgEquivNouns
  
  
x-1)^2

  
(x-1)^2

  
  -1
  ATAlgEquivNounsTEST_FAILED-Empty SA.




  
  The answer test failed to execute correctly: please alert your teacher. Attempted to execute an answer test with an empty student answer, probably a CAS validation problem when authoring the question.




  AlgEquivNouns
  
  
diff(x^2,x)

  
2*x

  
  1
  




  AlgEquivNouns
  
  
diff(x^2,x)

  
'diff(x^2,x)

  
  0
  




  AlgEquivNouns
  
  
diff(x^2,x)

  
'diff(x^2,x)

  
  0
  




  AlgEquivNouns
  
  
'diff(y,x)

  
noundiff(y,x)

  
  1
  




  AlgEquivNouns
  
  
diff(y,x)

  
0

  
  1
  




  AlgEquivNouns
  
  
'diff(y,x)

  
0

  
  0
  




  AlgEquivNouns
  
  
noundiff(y,x)

  
0

  
  0
  




  AlgEquivNouns
  
  
diff(y(x),x)

  
0

  
  0
  




  AlgEquivNouns
  
  
'diff(y,x,1)

  
'diff(y,x,2)

  
  0
  




  AlgEquivNouns
  
  
'diff(y(x),x)

  
'diff(y,x)

  
  0
  




  AlgEquivNouns
  
  
subst(y,y(x),'diff(y,x)+y
=1)

  
'diff(y,x)+y=1

  
  1
  ATEquation_sides




  AlgEquivNouns
  
  
subst(y,y(x),'diff(y(x),x
)+y(x)=1)

  
'diff(y,x)+y=1

  
  1
  ATEquation_sides




  AlgEquivNouns
  
  
subst(y(x),y,'diff(y,x)+y
=1)

  
'diff(y(x),x)+y(x)=1

  
  1
  ATEquation_sides




  AlgEquivNouns
  
  
subst(y(x),y,'diff(y,x)+y
=1)

  
'diff(y,x)+y=1

  
  0
  ATEquation_default




  AlgEquivNouns
  
  
subst(y(x),y,'diff(y(x),x
)+y(x)=1)

  
'diff(y,x)+y=1

  
  -1
  ATAlgEquivNouns_STACKERROR_SAns.




  
  TEST_FAILED




  
  The answer test failed to execute correctly: please alert your teacher. subst: cannot substitute y(x) for operator y in expression y(x)





  AlgEquivNouns
  
  
y_x

  
'diff(y,x)

  
  0
  




  Partials




  AlgEquivNouns
  
  
noundiff(f,x,1,y,1)

  
noundiff(noundiff(f,x),y)

  
  1
  




  AlgEquivNouns
  
  
noundiff(noundiff(f,y),x)

  
noundiff(noundiff(f,x),y)

  
  1
  




  AlgEquivNouns
  
  
noundiff(noundiff(f,x),x)

  
noundiff(f,x,2)

  
  1
  




  Differential equations




  AlgEquivNouns
  
  
noundiff(H,x,2) = -R/T

  
noundiff(H,x,2) + R/T = 0

  
  1
  ATEquation_ratio




  AlgEquivNouns
  
  
'diff(H,x,2) = -R/T

  
noundiff(H,x,2) + R/T = 0

  
  1
  ATEquation_ratio




  AlgEquivNouns
  
  
y(t)=int(s^2,s,0,t)

  
y(t)=t^3/3

  
  1
  ATEquation_sides




  AlgEquivNouns
  
  
y(t)='int(s^2,s,0,t)

  
y(t)=t^3/3

  
  0
  ATEquation_lhs_notrhs




  AlgEquivNouns
  
  
y(t)='int(s^2,s,0,t)

  
y(t)=nounint(s^2,s,0,t)

  
  1
  ATEquation_sides




  Logic nouns are still evaluated




  AlgEquivNouns
  
  
true nounand false

  
false

  
  1
  ATLogic_True.