find the derivative.

#1.)

f(x) = (3x+1)^3/(x)^6

#2.)

f(x) = 1/2x+sin^3x

..if someone could help me out Fast! id really appreciate it. thanks

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- Jan 24th 2006, 05:15 AMineedhelp123derivatives
find the derivative.

#1.)

f(x) = (3x+1)^3/(x)^6

#2.)

f(x) = 1/2x+sin^3x

..if someone could help me out Fast! id really appreciate it. thanks - Jan 24th 2006, 06:57 AMjacs
Here is the first one, using the quotient rule

$\displaystyle

y' = \frac{vu' - uv'}{v^2}

$

where

$\displaystyle

y = \frac{u}{v}

$ - Jan 24th 2006, 07:18 AMjacsQuote:

Originally Posted by**ineedhelp123**

$\displaystyle

y = \frac{1}{2x+sin^3 x}

$

hope that helps

jacs

ps. sorry about crappy handwriting hope you can read, not confident enough in laTex yet - Jan 24th 2006, 12:54 PMineedhelp123thanks!Quote:

Originally Posted by**jacs**

- Jan 24th 2006, 02:38 PMjacs
you are welcome