Find dy/dx for:

a) x³y + 3y - 4 = 0

b) 2x² + 4y + y² = 3

How would you start this problem?

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- Oct 24th 2009, 10:39 PMJohnny Walker BlackNeed Help getting started dy/dx
Find dy/dx for:

a) x³y + 3y - 4 = 0

b) 2x² + 4y + y² = 3

How would you start this problem? - Oct 24th 2009, 10:44 PMArturo_026
Use implicit differentiation, so for ex. 1:

[x^3(y') + y(3x^2)] + 3y' - 0 = 0

then you want to keep simplifying and eventually isolate y' in one side, so you can end up with a function of the form y'=