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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Hello dojo Originally Posted by dojo 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 Yes, you'll need to use both the quotient and the product rules: Does that look about right? Grandad
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
Hello dojo Originally Posted by dojo 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 Since is the same as , you could certainly write the denominator as , but not . Are you sure that's what the book said? If so, it's just a typo. Grandad
My typo!! thanks for the reply
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