Khan/khan-exercises — Issue #13996: Limits 2 - Answer is right, but the explaination of the solution is wrong
Author: KhanBugz
Created: 2012-02-16 18:11:34+00:00
State: open
Labels: lion, safari, wrong-or-unclear

Reporter: raffaellodn@gmail.com

Hello,

First of all, I would like to thank you for the fantastic work you have done so far!

About the problem: the answer of this limit is correct, however the explaination is wrong/inverted. That is, when the limit of -4/(x+2) as x approches -2 from the left is equal to (positive) infinity - and not negative infinty as reported in the solution - and vice versa when x approches -2 from the right.

Could you please check (if I'm wrong)?

Thank you again for creating this website! Keep up the awesome work!! =)

Regards,
Raffaello

[limits_2.html?seed=108&problem=a-o-xmk](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/limits_2.html?seed=108&problem=a-o-xmk&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/limits_2.html?seed=108&problem=a-o-xmk&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22%3Ccode%20style%3D%5C%5C%5C%22display%3A%20none%3B%20%5C%5C%5C%22%3E%2B%5C%5C%5C%5Cinfty%3C%2Fcode%3E%5C%22%22%2C31%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22%3Ccode%20style%3D%5C%5C%5C%22display%3A%20none%3B%20%5C%5C%5C%22%3E-%5C%5C%5C%5Cinfty%3C%2Fcode%3E%5C%22%22%2C3%5D%2C%5B%22correct-activity%22%2C%22%5C%22undefined%5C%22%22%2C4%5D%5D)

["+\\infty","-\\infty","undefined"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.53.11 (KHTML, like Gecko) Version/5.1.3 Safari/534.53.10

MathJax is loaded, ready, queue length: 0