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You could have posted a new thread for this. :-)
Help me!! I can't find a website that has work out sheets you can print out. Do you people have any?
I don't know the answer either. Sorry :-D
No I havnet.
You've published mathbooks?
I have to concur -- it should be a 2x in there. Having published a handful of math books, I must say it is not unreasonable to assume it is a misprint. They happen relatively often in math publishing, because the vast majority of book proofreaders don't understand math at all, which is kind of sad.
Many thanks, Mike. That is the same answer I got. But the answer the book gives is:
I just went ahead and registered after I posted the above solution, so you can direct comments and questions to me at this username.
Hey there, just stumbled across your forum. I run the web site www.calculus-help.com and am happy to post a solution. Just follow this link:
In case no one noticed, this still has not been solved. I'm pretty confident I'm doing it right but my book always end up right in the end.
I found this but don't know if it is on the same topic, nor do I know how to derive it.
Seems to arrive at the same place. But I'm not familar with that method.
Since your taking the derivative with respect to x, dx = 1. But you aren't taking the derivative with respect to y, so dy doesn't have to be 1. For example:
So you think maybe its a misprint?
"The only way I know how to solve this is implicit differentiation:"