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Cassiemut21
 Post subject: how do I find the derivative of a surd function say
PostPosted: Thu, 16 Feb 2012 07:53:41 UTC 
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say (square root 2x-3)/6 I just cant seem to get the right answer no matter what method i use.....SOS please help:?:
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outermeasure
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Thu, 16 Feb 2012 10:09:05 UTC 
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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.

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\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}
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Shadow
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Thu, 16 Feb 2012 21:21:07 UTC 
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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.

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Cassiemut21
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Fri, 17 Feb 2012 06:32:28 UTC 
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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 :(
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Shadow
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Fri, 17 Feb 2012 19:06:15 UTC 
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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.

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Shadow
 Post subject: Re: how do I find the derivative of a surd function say
PostPosted: Fri, 17 Feb 2012 19:07:06 UTC 
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In particular, I recommend you typeset your function with \LaTeX which we have help available for on our LaTeX board.

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