Posted by **Ron** on Friday, January 27, 2012 at 4:21pm.

The question I'm having problems with is

If f(x)=3x^2+7x+2, find f'(4) , using the definition of derivative.f'(4) is the limit as x--> ________ of the expression __________________. The value of this limit is _________________. I've got the first part that f'(4) is the limit as x--> 4, but I'm not sure what expression the second part is asking for. I can't find any examples and it's an online program, so I'm not sure if I got the answer and just didn't enter it correctly or I'm completely off. I'm pretty sure I can get the rest of the problem. Just need some help with the second part.

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