How Do You Apply Implicit Differentiation Correctly?

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SUMMARY

The forum discussion focuses on applying implicit differentiation to the equation x + xy = y². The correct differentiation process yields the equation 1 + xy y' = 2y y', which simplifies to y' = -1/(xy - 2y). The participant correctly identifies the need to apply the product rule for differentiating the term xy, clarifying that the derivative is y + xy' rather than xyy'. This highlights the importance of understanding implicit differentiation and the product rule in calculus.

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JessicaJ283782
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Homework Statement



Find the derivative of:

x+xy=y^2


Homework Equations




So I know you have to differentiate it, and it would be:

1+xyy'=2yy'

The Attempt at a Solution




Moving the terms with y' to one side:
1+xyy'-2yy'=0

xyy'-2yy'=-1

Factoring out y'

y'(xy-2y)=-1

y'=-1/(xy-2y)

Did I do that correctly?
 
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The derivative of xy is not xyy' but it is y + xy'
 
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For the xy part, you should use the product rule, f'g+g'f
 

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