
Calculus Calculus Math Forum 
 LinkBack  Thread Tools  Display Modes 
March 19th, 2017, 06:49 PM  #1 
Member Joined: Feb 2017 From: henderson Posts: 36 Thanks: 0  Find the tangent line approximation (#3)
Find the tangent line approximation for f(x) = √(15 + x) near 0
Last edited by skipjack; March 19th, 2017 at 11:06 PM. 
March 19th, 2017, 07:26 PM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,011 Thanks: 1044 
you should be able to do this given you did most of the other one. $f(x) = \sqrt{15+x},~f(0)=\sqrt{15}$ $f'(x) = \dfrac{1}{2\sqrt{15+x}},~f'(0) = \dfrac{1}{2\sqrt{15}}$ $f(x) \approx \dfrac {1}{2\sqrt{15}}x +\sqrt{15}$ 
March 19th, 2017, 08:25 PM  #3 
Senior Member Joined: Aug 2012 Posts: 1,960 Thanks: 547 
Should there be a daily limit on domyhomework posts from new handles? Am I rude or inappropriate to ask? OP nothing personal, you'd not doing anything a lot of other people do, just more of it.

March 19th, 2017, 11:35 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 19,191 Thanks: 1649 
That would be arbitrary. Bobbyjoe has read what to do, but is making careless errors, and possibly needs a better understanding. That's a common situation.

March 20th, 2017, 12:33 AM  #5 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,600 Thanks: 546 Math Focus: Yet to find out.  Even if there was, a bored helper would likely come along and do it anyway.


Tags 
approximation, find, line, tangent 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Find the tangent line approximation  Bobbyjoe  Calculus  1  March 19th, 2017 07:15 PM 
How to find the following tangent line  noobinmath  PreCalculus  4  March 23rd, 2016 10:31 AM 
How to find the tangent line?  DerGiLLster  Calculus  1  October 20th, 2015 07:04 PM 
Find the equation of the tangent line to G(x) .  Shamieh  Calculus  2  October 7th, 2013 05:12 AM 
Find the equation of the tangent line (3)  Shamieh  Calculus  1  October 4th, 2013 11:48 PM 