Khan/khan-exercises — Issue #15524: Domain of a function - X = 8 OK
Author: KhanBugz
Created: 2012-03-06 03:58:04+00:00
State: open
Labels: ie8, ie9, win7, wrong-or-unclear

Reporter: Dickcee@embarqmail.com

You state that teh radicand in the numerator must be greater than 0, hence greater than or equal to 8. However I can't see why the numerator cannot = 0, thus the restriction obn teh radicand is x greater than 8 not x greater than or equal to 8.

[domain_of_a_function.html?seed=98&problem=sqrt](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/domain_of_a_function.html?seed=98&problem=sqrt&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/domain_of_a_function.html?seed=98&problem=sqrt&debug&activity=%5B%5D)

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