Posted by **Abhi** on Friday, February 25, 2011 at 6:43pm.

Find f' if x power 7 + y power 7 = 8xy

- Calculus 1 -
**bobpursley**, Friday, February 25, 2011 at 7:08pm
x^7 + y^7 = 8xy

7x^6 dx+7y^6 dy=8y dx + 8x dy

dy(7y^6-8x)=dx(8y-7x^6)

solve for dy/dx

- Calculus 1 -
**Helper**, Friday, February 25, 2011 at 7:18pm
x^7 + y^7 = 8xy

7x^6 + 7y^6 y' = 8y + 8x y'

8x y' - 7y^6 y' = 7x^6 - 8y

y'(8x - 7y^6) = 7x^6 - 8y

y' = (7x^6 - 8y)/(8x - 7y^6)

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