Khan/khan-exercises — Issue #14638: Quotient rule - Something is wrong
Author: KhanBugz
Created: 2012-02-25 04:15:52+00:00
State: open
Labels: chrome, hard, win7

Reporter: weavols@cfl.rr.com

Either your videos explaining this are wrong, or this module is wrong. All of the examples you solved in videos by bringing the denominator to the numerator with a -1 exponent ended up with a -2 exponent on the term brought up from the denominator that is simply not there in the answers of this module, and not represented by the quotient formula being presented in the solution steps.

[quotient_rule.html?seed=102&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quotient_rule.html?seed=102&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quotient_rule.html?seed=102&problem=0&debug&activity=%5B%5B%22correct-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%5Cdfrac%7B(%5C%5C%5C%5Ccos%7Bx%7D\)(-x%5E%7B2%7D\)-(-2x\)(%5C%5C%5C%5Csin%7Bx%7D\)%7D%7B(-x%5E%7B2%7D\)%5E2%7D%3C%2Fcode%3E%5C%22%22%2C103%5D%5D)

["\\dfrac{(\\cos{x})(-x^{2})-(-2x)(\\sin{x})}{(-x^{2})^2}"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

MathJax is loaded, ready, queue length: 0