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September 3, 2014

September 3, 2014

Posted by **Ali** on Saturday, November 17, 2012 at 2:37pm.

If somebody could please help me by explaining how to solve this problem ! Thank you (:

- Calculus [Implicit Differentiation] -
**Steve**, Saturday, November 17, 2012 at 10:39pmjust take d/dx of each term in the equation. (f+g)' = f' + g', so you can treat each term on its ow.

Recall that dx/dx = 1, so

√x+√y=10

1/(2√x) dx/dx + 1/(2√y) dy/dx = 0

1/(2√x) + 1/(2√y) y' = 0

at x=16, y=36, so

1/(2*4) + 1/(2*6) y' = 0

y' = (-1/8) * 12 = -3/2

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