S.O.S. Mathematics CyberBoard

Your Resource for mathematics help on the web!
It is currently Wed, 22 May 2013 06:29:20 UTC

View unanswered posts | View active topics


Board index » High School and College Mathematics » Differential Equations

All times are UTC [ DST ]



Post new topic Reply to topic  Page 1 of 1
  [ 6 posts ] 
  Print view Previous topic | Next topic 
Author Message
Cassiemut21
 Post subject: how do I find the derivative of a surd function say
PostPosted: Thu, 16 Feb 2012 07:53:41 UTC 
Offline
S.O.S. Newbie

Joined: Thu, 16 Feb 2012 07:40:26 UTC
Posts: 4
say (square root 2x-3)/6 I just cant seem to get the right answer no matter what method i use.....SOS please help:?:
Top
 Profile  
 
outermeasure
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Thu, 16 Feb 2012 10:09:05 UTC 
Offline
Moderator
User avatar

Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6007
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
Cassiemut21 wrote:
say (square root 2x-3)/6 I just cant seem to get the right answer no matter what method i use.....SOS please help:?:


Please show your work.

_________________
\begin{aligned} Spin(1)&=O(1)=\mathbb{Z}/2&\quad&\text{and}\\ Spin(2)&=U(1)=SO(2)&&\text{are obvious}\\ Spin(3)&=Sp(1)=SU(2)&&\text{by }q\mapsto(\mathop{\mathrm{Im}}\mathbb{H}\ni p\mapsto qp\bar{q})\\ Spin(4)&=Sp(1)\times Sp(1)&&\text{by }(q_1,q_2)\mapsto(\mathbb{H}\ni p\mapsto q_1p\bar{q_2})\\ Spin(5)&=Sp(2)&&\text{by }\mathbb{HP}^1\cong S^4_{round}\hookrightarrow\mathbb{R}^5\\ Spin(6)&=SU(4)&&\text{by the irrep }\Lambda_+\mathbb{C}^4 \end{aligned}
Top
 Profile  
 
Shadow
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Thu, 16 Feb 2012 21:21:07 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12098
Location: Austin, TX
Cassiemut21 wrote:
say (square root 2x-3)/6 I just cant seem to get the right answer no matter what method i use.....SOS please help:?:


Use the chain rule. If you want more than that, you should do as outermeasure advises.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
Cassiemut21
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Fri, 17 Feb 2012 06:32:28 UTC 
Offline
S.O.S. Newbie

Joined: Thu, 16 Feb 2012 07:40:26 UTC
Posts: 4
my working:I used the quotient rule {6d/dx((2x)^1/2-3)-((2x)^1/2-3)d/dx6}/6*6.......got 108/square root(2x) which is not the right answer :(
Top
 Profile  
 
Shadow
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Fri, 17 Feb 2012 19:06:15 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12098
Location: Austin, TX
Cassiemut21 wrote:
my working:I used the quotient rule {6d/dx((2x)^1/2-3)-((2x)^1/2-3)d/dx6}/6*6.......got 108/square root(2x) which is not the right answer :(


What is your original function? I cannot tell if the square root goes with the 2, the 2x or the 2x-3.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
Shadow
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Fri, 17 Feb 2012 19:07:06 UTC 
Offline
Moderator
User avatar

Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12098
Location: Austin, TX
In particular, I recommend you typeset your function with \LaTeX which we have help available for on our LaTeX board.

_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 6 posts ] 

Board index » High School and College Mathematics » Differential Equations

All times are UTC [ DST ]

Who is online

Users browsing this forum: No registered users

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Contact Us | S.O.S. Mathematics Homepage
Privacy Statement | Search the "old" CyberBoard

users online during the last hour
Powered by phpBB © 2001, 2005-2011 phpBB Group.
Copyright © 1999-2013 MathMedics, LLC. All rights reserved.
Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA