quotient rule

**realistic** · March 31st 2011, 08:04 PM

[/IMG]i know how to derive when using the quotient rule but what about this one?

**pickslides** · March 31st 2011, 08:53 PM

$\displaystyle y= \frac{3}{5r+11}\implies y' = \frac{(5r+11)\times (3)'-(5r+11)'(3)}{(5r+11)^2}$

**realistic** · March 31st 2011, 09:01 PM

thanks for the answer could you please explain the steps reasoning so i can get it.

**pickslides** · March 31st 2011, 09:14 PM

Yep, I can,

The quotient rule

$\displaystyle y= \frac{u}{v}\implies y' = \frac{vu'-v'u}{v^2}$

Or you can say

$\displaystyle y= \frac{3}{5r+11} = 3(5r+11)^{-1}$

then use the chain rule.

**realistic** · March 31st 2011, 09:16 PM

thank you very much i now see how you did it thanks a bunch

**Prove It** · March 31st 2011, 09:18 PM

By the way, seeing as this is clearly a Calculus question, why have you posted it in Pre-Calculus?

**realistic** · March 31st 2011, 09:30 PM

I thought only university questions could go there?

if that's wrong how do i move the thread?

**Ackbeet** · April 1st 2011, 02:41 AM

To move the thread, report your own post using the Report Post tool at the lower left corner of the OP. Looks like a triangle with an exclamation mark inside it. A mod will move it for you.

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