Question 958977
(1/y)=4x+4y 
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Rewrite::
y^-1 = 4x + 4y
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Differentiate::
-y^-2*y' = 4 + 4y'
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solve for y'
6y' = -y^-2 - 4
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y' = (-1/6)((1/y^2)+4)
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Cheers,
Stan H.
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