Hi - I just can't seem to get this one right. Looking to get the first derivative...

(1 + xe^x)/(1 - xe^x)

I assume that you use the quotient rule but I end up in a mess.

Could someone please talk me thorugh this one?

Thanks, D

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- March 7th 2010, 10:18 AMdojo[SOLVED] Tricky Diff question
Hi - I just can't seem to get this one right. Looking to get the first derivative...

(1 + xe^x)/(1 - xe^x)

I assume that you use the quotient rule but I end up in a mess.

Could someone please talk me thorugh this one?

Thanks, D - March 7th 2010, 10:29 AMGrandad
- March 8th 2010, 05:37 AMdojo
The book gives the answer with the same numerator as you have bu the denom as (xe^2 - 1)^2

Thanks for the workings - I think my algebra needs a bit of work. I think the book must be wrong as the quotien rule does state that v^2 is the denom.

Thanks - March 8th 2010, 07:00 AMGrandad
- March 8th 2010, 07:30 AMdojo
My typo!! thanks for the reply(Happy)