Khan/khan-exercises — Issue #9449: Special derivatives - Answer is wrong 
Author: KhanBugz
Created: 2011-12-24 08:35:26+00:00
State: open
Labels: safari, win7, wrong-or-unclear

Reporter: camachj1@sunyit.edu

just flicking through some derivatives when i noticed one of the questions posed a wrong answer. i have a screen shot of it if you like it to be sent. i also noticed ALOT of repetition in questions back to back to back even. Don't know if theirs anything wrong in the code.
thanks James Camacho

[special_derivatives.html?seed=11&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/special_derivatives.html?seed=11&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/special_derivatives.html?seed=11&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22None%20of%20the%20above.%5C%22%22%2C27%5D%2C%5B%22hint-activity%22%2C%220%22%2C33%5D%5D)

["None of the above."]

Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1

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