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could someone please clarrify how to do this step? It's midway through a large problem and I'm not so sure about it.

y is a function of x.

[tex]\frac {d}{dx} ( \frac {y} \sqrt{1 + y'}} )[/tex]

Please excuse the Latex. The square root of 1 + y' is being taken on the denominator .

Do you just use the quotient rule? and does [itex] \frac {d} {dx}y[/itex] equal [itex]y'[/itex]?

thanks

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# Simple calculus question

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