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

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