November 2nd, 2009, 04:38 PM  #1 
Newbie Joined: Nov 2009 Posts: 1 Thanks: 0  determine f'( x )
can someone explain to me how to do these, i tried the first 2 and it kept giving me wrong( online system) If f(x) = 2 x^{5}  8 e^x, determine f'( x ). 10x^4  8e^x wrong Find f'( 1 ). 108eˆ(1) wrong Find f''( x ). Find f''( 1 ). 
November 2nd, 2009, 04:53 PM  #2 
Senior Member Joined: May 2008 From: York, UK Posts: 1,300 Thanks: 0 
Your answers are right  are you sure you are inputting them in a way the online system can understand? Do you need to put explicit multiplication signs in, for example?

November 3rd, 2009, 07:46 AM  #3 
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: determine f'( x )
Mattpi means 2* x^5  8*e^x for example.


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