December 14th, 2016, 02:37 AM  #21 
Newbie Joined: Dec 2016 From: Sweden Posts: 13 Thanks: 1  
December 14th, 2016, 02:41 AM  #22  
Newbie Joined: Dec 2016 From: Sweden Posts: 13 Thanks: 1  Quote:
Then used copy paste. Didn't even see you already simplified it. Last edited by skipjack; December 14th, 2016 at 10:40 AM.  
December 14th, 2016, 02:44 AM  #23  
Math Team Joined: Jul 2011 From: North America, 42nd parallel Posts: 3,372 Thanks: 233  Quote:
Note that the introduction of the sgn(h) notation makes it absolutely clear that the 2sided limit does not exist since h > 0 from both the positive and the negative. Last edited by skipjack; December 14th, 2016 at 10:38 AM.  

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abs, calculus, hard, limit, newton, point, problem, quotient, variable 
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