dx/dt = dx/dy x dy/dt

Differentiate xy = 1 implicitly to find dx/dy

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- November 3rd 2010, 05:48 PM #1

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- November 3rd 2010, 06:13 PM #2

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- November 3rd 2010, 06:15 PM #3

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You need to use a product rule

(chain rule on the inside because this is with respect to t)

You are given x = 1 so then (1)(y)=1

y=1

substitute all the values in and solve for this is part of related rates if you'd like to read in your calculus textbook to clear up any thing you're confused about.

- November 3rd 2010, 06:39 PM #4

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- November 3rd 2010, 06:43 PM #5