
Calculus Calculus Math Forum 
 LinkBack  Thread Tools  Display Modes 
March 21st, 2009, 03:27 AM  #1 
Newbie Joined: Mar 2008 Posts: 3 Thanks: 0  Derivative function  how do I insert values?
Hi I have the derivative function: f'(x)= lim h>0 = [ f(x+h)f(x) ] / h The question is: Find from the first principles the gradient of f(x) where f(x) is: a) x b) 5 c) x^3 My problem is, I have no idea how I insert these values into the formula...? If someone shows me how to do this step by step I would be very thankful!! 
March 21st, 2009, 05:19 AM  #2 
Guest Joined: Posts: n/a Thanks:  Re: Derivative function  how do I insert values?
Plug in x+h for x in f(x+h). Like so. I will use x^3 Expand: Canceling the h's and leaving those that remain approach 0, leaves us with: , which is the derivative of . 
March 21st, 2009, 07:42 AM  #3  
Senior Member Joined: Mar 2009 Posts: 318 Thanks: 0  Quote:
To learn how, try studying some lessons on function notation. Short version: Whatever they want you to evaluate at (like x, 5, or x^3), plug that in for every "x" in your function formula.  

Tags 
derivative, function, insert, values 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Some values of derivative of unknown function f?  shiseonji  Calculus  1  February 21st, 2014 04:53 AM 
Estimating derivative from table of values  tham  Calculus  1  September 15th, 2012 03:43 PM 
Derivative and table of values  rk183  Calculus  2  October 2nd, 2011 07:37 PM 
Storing Prime Numbers for fast insert and Lookup and Insert  John Creighton  Number Theory  2  September 21st, 2010 03:34 PM 
Values of the derivative greatest and least graph  wicked357  Calculus  3  January 25th, 2010 01:02 PM 