Khan/khan-exercises — Issue #5117: Chain rule 1 - chain rule exercises lists an answer as wrong that is actually right
Author: KhanBugz
Created: 2011-10-28 02:38:06+00:00
State: open
Labels: chrome, snowleo

Reporter: bob.thorson@nscee.edu

the chain rule problem listed the problem
g(x)=(x^4)^4 and lists as one of the choices
(-4(x^4)^3)(-4 x^3)
which is a correct answer since the -'s cancel
and since the answer it had as correct was none of the above it didn't have a 'more' correct form to chose.

[chain_rule_1.html?seed=113&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/chain_rule_1.html?seed=113&problem=0&debug)

["None of the above."]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2

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