 My Math Forum Derivative function - how do I insert values?
 User Name Remember Me? Password

 Calculus Calculus Math Forum

 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:
 Originally Posted by toulouse f'(x)= lim h->0 = [ f(x+h)-f(x) ] / h 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...?
Ouch! They were supposed to have covered that topic back in algebra! 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

### find the value of the unknown function f complete the table

Click on a term to search for related topics.
 Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post shiseonji Calculus 1 February 21st, 2014 04:53 AM tham Calculus 1 September 15th, 2012 03:43 PM rk183 Calculus 2 October 2nd, 2011 07:37 PM John Creighton Number Theory 2 September 21st, 2010 03:34 PM wicked357 Calculus 3 January 25th, 2010 01:02 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top

Copyright © 2019 My Math Forum. All rights reserved.      