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kcline@c... - Indefinite Integrals

kcline@c... - Indefinite Integrals

by Arnold Pizer -
Number of replies: 0
inactiveTopicIndefinite Integrals topic started 3/2/2006; 4:11:40 PM
last post 3/2/2006; 11:27:50 PM
userkcline@c... - Indefinite Integrals  blueArrow
3/2/2006; 4:11:40 PM (reads: 379, responses: 1)
Apologies & Disclaimer: This is probably in an faq somewhere, but I can't find it, and I am a real newbie with all this, but...

I want to assign a problem involving an indefinite integral where the students put a +C at the end of their answer. Is this possible? The problems that I've found use function_cmp_up_to_constant, which is great for checking antiderivatives. However I want real indefinite integrals, where the answer must have a +C on the end in order for the problem to be marked correct. How do you do that?

Thanks in advance!

--Kelly Cline

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userGavin LaRose - Re: Indefinite Integrals  blueArrow
3/2/2006; 11:27:50 PM (reads: 522, responses: 0)
Hi Kelly,

A not very elegant solution is to use fun_cmp or fun_cmp_up_to_constant and just include C as an additional variable. For example, 

  \(\int x^2\,dx \) = \{ ans_rule(35) \}
  $BR
  ${BITALIC}(Use the capital letter "C" for any constant that 
  you may need in your answer.)$EITALIC
  ...
  ANS( fun_cmp( "2*x", 'var'=>['x','C'], 'mode'=>'antider' ) );

This is what I've been doing in this case; a more elegant solution would be to use the Parser explicitly and declare C to be a constant. But I'd have to go and look that one up, so I'll leave it to someone else to elucidate.

Cheers,
Gavin

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