My Math Forum  

Go Back   My Math Forum > College Math Forum > Linear Algebra

Linear Algebra Linear Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
January 28th, 2010, 07:04 PM   #1
Member
 
Joined: Jan 2010

Posts: 82
Thanks: 0

...and still. trouble with complex frac. in limit problem

This is slightly embarrassing but I'll put my pride out of the way in hopes of learning what boneheaded thing I'm doing wrong so that I might correct it. Have to use the limit equation to find the derivative. super tedious. *sigh* I'm posting here rather than in calculus because the area in question (I think) is algebraic in nature.
Attached Images
File Type: jpg form_html_m28b640f2.jpg (72.9 KB, 229 views)
oddlogic is offline  
 
January 28th, 2010, 07:06 PM   #2
Member
 
Joined: Jan 2010

Posts: 82
Thanks: 0

Re: ...and still. trouble with complex frac. in limit problem

well, i see the first thing wrong is that I multiplied by a -sqrt(g+h+1). doh!
oddlogic is offline  
January 28th, 2010, 10:49 PM   #3
Newbie
 
Joined: Jan 2010

Posts: 21
Thanks: 0

Re: ...and still. trouble with complex frac. in limit problem

This is how I have made it :


Eventually :



fur_vaterland_123 is offline  
January 29th, 2010, 12:20 AM   #4
Senior Member
 
Joined: Feb 2009
From: Adelaide, Australia

Posts: 1,519
Thanks: 3

Re: ...and still. trouble with complex frac. in limit problem

Not easy at all.

A couple of typos: at the end of the longest line there is a factor (x0+1), where the 0 should be a subscript; and the denominator in the second-last line should not begin "h" (as it's been cancelled).
aswoods is offline  
January 29th, 2010, 12:56 AM   #5
Newbie
 
Joined: Jan 2010

Posts: 21
Thanks: 0

Re: ...and still. trouble with complex frac. in limit problem

Man! You got some good eyes, I haven't noticed it. 10x

BTW - oddlogic, can I suggest that you try LaTeX or at least Windows Equation?
I have tried OpenOffice Math but it wasn't pleasant. From experience, LaTeX is the best.
fur_vaterland_123 is offline  
January 29th, 2010, 04:06 AM   #6
Member
 
Joined: Jan 2010

Posts: 82
Thanks: 0

Re: ...and still. trouble with complex frac. in limit problem

yes you may fur. I was just trying to make it easier to read at my own expense and the expense in openoffice math is that it's finicky regarding parenthesis, thus time consuming. Thanks to you both. I will apply this immediately.
oddlogic is offline  
January 29th, 2010, 08:55 AM   #7
Member
 
Joined: Jan 2010

Posts: 82
Thanks: 0

Re: ...and still. trouble with complex frac. in limit problem

omg-
felt really silly after seeing these worked this morning. I was trying to make things much more complicated than they need be. These are simple problems.

To anyone working these problems, there is no need to multiply anything on bottom (most of the time) and take your first opportunity to make the h=0. With that said, pay particular attention to the way that things cancel on top in early examples, so that you can apply it in later examples without much hassle.
oddlogic is offline  
Reply

  My Math Forum > College Math Forum > Linear Algebra

Tags
complex, frac, limit, problem, trouble



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
In what situation frac of limits equals to limit of frac? stainburg Calculus 17 November 24th, 2013 12:14 AM
trouble in infinite limit Zynoakib Calculus 2 October 19th, 2013 06:02 AM
Having Trouble Deriving limit as x->infinity saxophonemaster Calculus 12 September 23rd, 2012 09:41 PM
Trouble Inverting Complex Matrix mmmboh Linear Algebra 2 January 15th, 2010 12:40 AM
frac(e^n) Yegreg Number Theory 1 December 3rd, 2007 07:33 PM





Copyright © 2019 My Math Forum. All rights reserved.